Rainley Bossa Inline Shower Filter for Hard Water
Used MicronFlo transparent shower filter cartridges from Alabama and Maryland homes, showing how pleat discoloration differs by local water
Rainley Bossa inline shower filter
Feel relaxed after every shower with Rainley: softer skin and calmer hair, shown with a woman floating peacefully in clear blue water and a Bossa shower filter
Rainley shower filter works with both municipal water and well water, shown with a person showering behind fogged glass and a Bossa filter with MicronFlo cartridge
Rainley Bossa shower filter installs tool-free on a standard 1/2" NPT shower arm with a rubber washer, measuring 4.65" long by 3.31" wide
How MicronFlo works: a clear casing lets you see the 5-micron pleated sieve change color as it catches contaminants, while inner layers of calcium sulfite, KDF and activated carbon reduce chlorine, heavy metals and odors
Rainley Bossa shower filter fits every shower type, shown installed with a fixed showerhead, a handheld shower and a rain shower
Rainley shower filters are also built for small businesses, shown in a gym locker room shower, a hair salon wash station and a nail salon pedicure basin, with a Bossa filter with MicronFlo cartridge
Trusted by thousands of Rainley customers: a woman enjoying a shower under a Rainley filter installed on the shower arm, with real results from real showers
Rainley Bossa Inline Shower Filter for Hard Water
Used MicronFlo transparent shower filter cartridges from Alabama and Maryland homes, showing how pleat discoloration differs by local water
Rainley Bossa inline shower filter
Feel relaxed after every shower with Rainley: softer skin and calmer hair, shown with a woman floating peacefully in clear blue water and a Bossa shower filter
Rainley shower filter works with both municipal water and well water, shown with a person showering behind fogged glass and a Bossa filter with MicronFlo cartridge
Rainley Bossa shower filter installs tool-free on a standard 1/2" NPT shower arm with a rubber washer, measuring 4.65" long by 3.31" wide
How MicronFlo works: a clear casing lets you see the 5-micron pleated sieve change color as it catches contaminants, while inner layers of calcium sulfite, KDF and activated carbon reduce chlorine, heavy metals and odors
Rainley Bossa shower filter fits every shower type, shown installed with a fixed showerhead, a handheld shower and a rain shower
Rainley shower filters are also built for small businesses, shown in a gym locker room shower, a hair salon wash station and a nail salon pedicure basin, with a Bossa filter with MicronFlo cartridge
Trusted by thousands of Rainley customers: a woman enjoying a shower under a Rainley filter installed on the shower arm, with real results from real showers

Rainley Bossa Inline Shower Filter for Hard Water

$65.00 USD
1 Bossa
For 1 bathroom (no spare MicronFlo)
$65
Kit OptionsSave up to 50%
Starter Kit
1 Bossa ($65) + 1 spare MicronFlo ($40)
$105$90
Save 14%
Best value
2 Bossa BUY 1 GET 1 FREE
2 Bossa ($65 each), for 2 bathrooms
$130$65
Save 50%
2 Bossa + 2 spares
2 Bossa ($65 each) + 2 MicronFlo ($40 each)
$210$160
Save 24%

Bossa is an inline shower filter that installs in under 2 minutes between your existing shower arm and showerhead, with no tools, no plumber, and no replacement of anything you already have. It fits all standard ½" IPS connections and works with both fixed and handheld setups.

At its core is the MicronFlo replacement cartridge (USPTO patent pending Application No. 18/788,307): a pleated filter membrane that uses mechanical sieving to capture particles as small as 5 microns, including sediment, rust, pipe scale, sand, and larger microplastics that loose-media filters let through. Once pre-filtered by the pleats, water passes through an inner chamber where KDF-55, Calcium Sulfite, and Activated Carbon Fiber work to reduce chlorine, chloramines, heavy metals, and chemical impurities that contribute to dry skin, scalp irritation, frizz, and dull hair.

What makes Bossa different from every other inline filter is what you can see. Inside the housing sits the transparent MicronFlo cartridge. Open it up and you can see how the white pleats have changed, turning amber, brown or grey depending on your local water. No guessing, no subscription schedules, no arbitrary replacement dates. You replace it when you can see it's time.

Bossa is designed for both municipal tap water and private well water. It is compatible with hard water conditions and addresses the contaminants most commonly associated with post-shower dryness, irritation, eczema flares, frizzy hair, color fade, and scalp sensitivity.

What Bossa reduces: chlorine, chloramines, heavy metals, iron, rust, sediment, pipe scale, microplastics (particles larger than 5 microns), and hydrogen sulfide.

What Bossa does not do: it does not boost your home's incoming water pressure, which is determined by your municipality or well infrastructure and is outside the product's control. It does not remove nitrates, arsenic, fluoride, or biological contaminants requiring UV or reverse osmosis treatment. If your well water has known nitrate or arsenic contamination, consult a certified water treatment specialist.

If your flow slows noticeably, take a look at the cartridge. Depending on your local water, the white pleats may turn amber, brown or grey, and in some homes the change is only slight. Whatever the shade, a visible change means the filter is catching what's in your water and doing its job. Replace the cartridge and continue with cleaner water.

BPA-free. Leak-proof construction. Free ground shipping within the continental US.

Rainley Bossa Inline Shower...

Dazzle Chrome

$65.00 USD

MicronFlo Technology

The Science Behind MicronFlo

Rainley’s unique MicronFlo technology is designed to capture impurities at a micron level, delivering cleaner water for healthier skin and hair.

🌱 Activated Carbon Fiber

Absorbs impurities for fresher water.

🚿 Calcium Sulfite

Removes chlorine that dries out skin and hair.

🌟 KDF55

Neutralizes heavy metals.

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What MicronFlo Reduces

Chlorine & chloramine

Heavy metals & iron

Sediment & pipe scale

Rust and dirt particles

Without Filter
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With Rainley
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With Rainley, every shower becomes a true self-care ritual.

  • 5 stars: 45 (76%)
  • 4 stars: 7 (12%)
  • 3 stars: 0 (0%)
  • 2 stars: 5 (8%)
  • 1 star: 2 (3%)
D
Daniel Zhang
Found this after a hard water wake-up call

A few months back, I experienced a cracked braided supply line under my bathroom sink, coated in white chalky mineral buildup and then came the messy cleanup just drove me crazy. That residue is calcium and lime scale, left behind by hard water eating away at metal and rubber over time. Because I often had dry, itchy skin and damaged, brittle hair like never felt I could achieve a satisfactory rinse no matter how long I stayed under the shower. It took me far too long to recognize our poor-quality water.Almost a month in, out of curiosity, I unscrewed the mid body section of the housing to take a look at the cartridge. Being able to see the filtration happening (check out my photo) rather than just take it on faith made it feel real instead of a marketing claim.If you're even a little in doubt, try this filter out. I feel like it's already helping repair my skin and hair after the first week of using it. I have a feeling some users, like myself, may need to replace the cartridge more frequently than some arbitrary schedule, but the nice thing is I can literally tell just by looking at my used cartridge. I love that about this brand, I am not guessing.I don't know how to describe it, but the water coming out of the filter instantly feels different, in an excellent way. It feels silky. Now I don't step out of a 10-minute shower feeling like I've still got conditioner in my hair and soap scum on my skin.At this price point, it's a smart, affordable alternative to a whole house filtration system, you know, this felt like reasonable insurance.

A
Alyssa F.
It works!

This was one of my best purchases hands down.

K
K. Sheltra
Wow! This filter is amazing.

We have seen a huge improvement of our skin and also there is very little hair loss in the shower drain now.

N
Noel S
Good Investment

The Rainley Bossa Inline Shower Filter is one of those rare bathroom upgrades that delivers visible, feel-it-in-your-skin results almost immediately—especially if you live in a hard water area like Florida, where chlorine, heavy metals, sediments, and minerals can leave your skin and hair feeling stripped and dry.We received ours on Saturday and my husband installed it the same day. He said it was incredibly easy—no tools needed, just a quick screw-on to our standard shower arm. It comes with everything required (including rubber washers for a secure, leak-proof fit), and the chrome finish looks sleek and modern without being bulky. He ran the water for about 15 minutes to flush it out, and there was no gunk or debris at all—clean from the start.Day 1 ImpressionsMy husband was the skeptic at first—he'd been pushing for a different brand—but after I showed him the glowing reviews, we went with the Rainley Bossa. He hopped in for what turned into nearly 30 minutes! When I asked what was taking so long, he said, "The water just feels really soft on my skin—I don't even want to get out." He emerged amazed at how incredibly soft his skin felt, like a baby's bottom, with no lotion or moisturizer applied. His face had a healthy glow instead of the usual dry, ashy look, and it didn't feel stripped at all.Normally, after showering with our hard Florida water, both our skin feels tight, dry, and stripped no matter what body wash or soap we use. Moisturizers just sit on top without absorbing properly, and we end up needing to exfoliate constantly. But this time? Total game-changer.Then it was my turn. I have eczema that I've been managing with almond oil and cocoa butter lotion right after showering for better absorption. I washed as usual with my regular soap and body wash, rinsed, and dried off—and I couldn't believe how unbelievably soft my skin was! My face was glowing in the mirror without any moisturizer yet. Even when I'd previously showered with just water, my face felt dry and tight. This time, when I applied my vitamin E oil to my face, it glided on smoothly and absorbed beautifully—no greasy residue or fighting to work it in. I put almond oil on my body, and every inch felt brand new, deeply nourished, and incredibly soft.Another surprising bonus: the fresh scent of my body wash lingered all the way into the next morning. It never used to last like that before.Performance HighlightsThe Rainley Bossa uses micron-level filtration, capturing impurities, microplastics, chlorine (up to high percentages), heavy metals, rust, sediments, limescale, and other contaminants that standard filters often miss. It tackles hard water issues head-on, reducing dryness, itchiness, irritation, and even helping with conditions like eczema or sensitive skin. The anti-clog side-inlet design maintains high, powerful water pressure-no noticeable drop-off, which is a huge win over other filters that get clogged or weaken flow over time.Longevity and MaintenanceThe transparent casing lets you monitor the filter easily. We've already planned for our first replacement because we have no intention of going back to unfiltered hard water.Final ThoughtsIf you're dealing with hard water woes—like chronically dry, stripped skin, dull hair, scalp irritation, eczema flare-ups, or just wanting softer, healthier-feeling showers—the Rainley Bossa Inline Shower Filter is a smart, worthwhile investment. It's affordable, installs in minutes, keeps strong pressure, and provides real, noticeable improvements in skin softness, glow, moisture absorption, and overall shower comfort. We did a month of research before buying and couldn't be happier—it's turned our daily showers into something truly restorative and nourishing. Highly recommended for anyone in a hard water area or looking to cut exposure to harsh chemicals and impurities! I'll update again after a few hair washes, but so far, we're thrilled.

A
Addison Wu
Recommended by my hair salon, believe it or not

We've got horrible hard water here—it's like the pipes are plotting against you. My hair was falling out in clumps after every wash, scalp dry and irritated, and I'd spend hours detangling the straw-like strands. It got to me mentally; I avoided washing it some days just to save what was left. Saw this at my hair salon (yeap, my hair salon) and thought, why not? installation was 3 minutes tops, and holy cow - the difference in a week, Mind blown! Hair fall has plummeted, and it's actually soft and manageable—no more endless shedding in the drain. Skin feels balanced too, less tight. This made our bathroom a safe haven again and I signed up for the subscribe and save for the filter cartridge replacements.

D
Delmaris
Leak-Proof, Cleaner Water, Glowing Skin & Hair, Easy Setup!

I was not expecting to love the bossa shower filter by Rainley. I live in a place with super hard water that smells like a public pool half the time, and this filter has made such a difference. Right from the first shower, the water felt cleaner, like all that chlorine and gunk was gone. My bathroom tiles aren’t getting that gross soap scum buildup anymore, which is a huge win because I hate scrubbing them.My skin and hair are honestly thriving now. My skin used to feel so dry and tight after showers, but now it’s actually soft and doesn’t itch at all. My hair’s another story—it’s way shinier, less frizzy, and my color-treated highlights are holding on way longer than usual. No more of that crunchy, dull mess I was dealing with before.I was a bit worried it’d kill my water pressure, but nope, the flow’s still strong and feels great. Installing it was a total no-brainer—took like 30 seconds, no tools, and it hooked right up to my shower arm without any leaks. The build feels solid too, not some flimsy plastic thing that’s gonna break. I can see the filter doing its thing through the clear case, which is kinda cool and makes me trust it’s working. The price is higher, but my skin and hair deserve the best water, and this filter totally delivers. I’m already raving about it to everyone I know!

T
Tj
Fresh water, healthier skin!!

I’m really impressed with this shower filter! It’s easy to install, and the water feels so much cleaner and fresher. My skin and hair have been feeling softer, and I’ve noticed less irritation. The pressure is strong, and it doesn’t compromise on flow. It’s a simple but effective upgrade for better showering every day.

J
Jay
Perfect Fit and Easy Installation – Highly Recommend!

Excellent shower filter O-ring included! It fit perfectly with my shower head, even though it’s a different brand. Installation was a breeze, and the water quality was as good as with the previous filter that came with my shower head. Definitely an improvement with water quality when using these filters. Highly recommend!

c
cl
Rainley Bossa Inline Shower...

What I love most about this product is how easy it is to install. It also removes the typical smell from the water, so my showers feel so much more refreshing lately, and my skin feels softer. After moving to a new place, the smell of the water made showering unpleasant, but ever since I installed this filter, I’ve started to truly enjoy my showers again.

A
Anonymous

Has improved my skin and hair.

D
DelaniZavacky
Great product

Great product and I noticed a difference in my hair color lasting almost immediately

L
Lisa Lenz
Good

Works well. No instructions on when to change or where to purchase replacement filters

C
Chuck Prime
Better water, so many benefits!

I’ve tried a few shower filters before, but this one has honestly been my favorite.It was super easy to install. Everything I needed was already in the box, and I had it hooked up in just a few minutes without needing any tools. The instructions were clear, so the whole process was pretty straightforward.One of the things I like most is that the filter is clear, so you can actually see what it’s catching over time. Instead of just hoping it’s working, you can literally see the dirt and sediment it’s filtering out. That gives me a lot more confidence that it’s doing its job.After using it for about 10 days, I definitely noticed a difference. My skin doesn’t feel as dry after I shower, and my hair feels softer and isn’t nearly as frizzy. I also feel like my scalp is less irritated. I wasn’t expecting a huge change, but I was pleasantly surprised by how noticeable it was.Another thing I was happy about is that it didn’t reduce my water pressure. I’ve used filters before that made my shower feel weak, but this one still has great water flow.Overall, this just feels like a really well-made product. If you have hard water, sensitive skin, dry skin, or you’re just looking for cleaner shower water, I think it’s absolutely worth trying. It’s one of those small upgrades that makes a difference every day, and I’m really happy with my purchase.

H
Hardeep
Highly recommend

Bought this product about a week ago it was easy to install and easy to follow instructions. I’ve used it for about a week and I have noticed results with cleaner skink. My hair feels cleaner and nicer. I do have hard water at my house and have a softener so this definitely helps my situation.

N
N
I finally have clean and softer water!

I've been using this shower water filter for a while now, and I absolutely love it. I finally have clean and softer water! It feels cleaner, softer, and much more enjoyable to shower in. I've noticed my skin feels less dry, my hair looks healthier, and the strong chlorine smell is greatly reduced. It's extremely durable and doesn't leak or need maintenance. It's one of those products that delivers exactly what it promises. Overall, I'm extremely happy with it and would highly recommend it to anyone looking to improve their shower experience.

K
Kindle Customer
Great, easy to install water filter

I absolutely love the Rainley Bossa showerhead filter.I've tried other brands before but this one is by far my favorite, it's super easy to install and it comes with clear instructions. It does a great job filtering the water, I've noticed my hair feels softer and healthier since I put it on and my boyfriend said the same thing. If you are looking for a well made, easy to install filter I definitely recommend this one!

J
Janet Brede
FILTER OF LIES

DOES NOT WORK.Used a PPM meter, and it was 486. Absolutely terrible. Also, product support doesn't answer. It’s just a scammy product. Find another filter.

L
Lance Gouvan
Good water filter

Very good water filter

B
Brenda W
Not a smart choice for me.

Didn't last 2 months. Extreme disappointment with the filter replacement time.

L
Lindsay M. Layendecker
Love it so far

I’ve only used it once and I can definitely tell the difference in my hair. Buying a second one for the guest bath.

s
shigh76
Great Addition for my shower

I decided to purchase this showerhead filter because I have a well and have to deal with hard water a lot (you may even be able to see the hard water stains on my showerhead). The results I noticed were almost immediate. First, I could tell my skin feels less dry, which is amazing. I also noticed that I don’t have hard water stains in my shower, which makes cleaning much easier.The installation was simple and did not affect the water pressure. If you struggle with hard water and want cleaner water coming out of your showerhead, then I highly recommend this showerhead filter. It is an easy and simple upgrade that will make a big difference in your routine.Update-So its been alittle over 2 months since I installed this showerhead filter and want to post the results of the filter. As you can see it works!

S
Shawn R
Los pressure. Limited movement.

Plastic container holding a paper filter. Shower pressure is reduced.The angle is very limited in movement, and keeps the shower aimed at my feet.

E
Ed Nelson
Filters well

Great product

s
susan gorecki
Installation

So far it seems to cut down on the pressure in the shower head. Didn’t know if it should be fitted alone or behind the existing shower head. The burning in my eyes from the water in the shower has dimishied so that’s good. Very low pressure as a result, read instructions well to know how to be installed.