Rainley Bossa Inline Shower Filter for Hard Water
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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.
What's In The Box
What's In The Box
Specs
Specs
Benefits
Benefits
Did you know that most tap water contains chlorine, heavy metals, and other harmful contaminants that can damage your skin and hair? These impurities are known to cause:
✨ Dry, irritated skin
✨ Frizzy, brittle hair
✨ Dull hair color
✨ Rashes and sensitivities
Rainley’s MicronFlo filter effectively removes these contaminants, leaving you with pure, nourishing water.
Experience the benefits of cleaner water:
💧 Softer, smoother skin
💧 Healthier, shinier hair
💧 Reduced irritation and sensitivities
Invest in your skin and hair with every shower—because you deserve water that cares for you.
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.
What MicronFlo Reduces