
PP Cotton — Pre-Filter
Your first line of defense. Medical-grade polypropylene cotton captures sediment, rust, and particulates before they ever reach your skin — so the deeper filtration layers can do their best
work.
Calcium Sulfite — Chlorine Neutralizer
The workhorse of chlorine elimination. Calcium sulfite reacts with free chlorine on contact, neutralizing up to 99.5% before it can strip your hair and skin of their natural oils. Lab-verified.
No guesswork.
Vitamin C — Chloramine Shield
Chlorine's tougher cousin — chloramine — doesn't go down easy. Ascorbic acid breaks the chloramine bond on contact, providing a second layer of chemical neutralization that most filters skip entirely.
KDF 55 — Heavy Metal Defense
USA-made KDF 55 media uses a copper-zinc redox reaction to reduce lead, mercury, copper, and chromium from your water. It also inhibits bacteria and algae growth inside the filter — keeping your water clean between changes.
PP Cotton — Final Polish
The finishing touch. A second layer of polypropylene cotton catches anything the upper stages loosened — delivering water that's not just filtered, but truly clean. From first drop to last.
The Ultimate Longevity Powerhouse
While most shower filters rely on a single layer of cheap media and zero third-party testing, Sift is engineered with a 5-layer filtration system using USA-made media — verified by independent labs, not marketing claims.
|   | SIFT | Others |
|---|---|---|
| Third-Party Lab Tested | ||
| Discloses All Ingredients | ||
| USA-Made Filtration Media | ||
| 3-Layer Filtration System | ||
| Up to 99.5% Chlorine Removal | ||
| NSF-Approved Ingredients |
We are serious about filtration, ask away
What exactly is inside the Sift filter?
What exactly is inside the Sift filter?
Sift uses a 5-layer filtration stack: PP Cotton for sediment pre-filtration, Calcium Sulfite for chlorine neutralization, Vitamin C for chloramine reduction, KDF 55 for heavy metal defense, and a final PP Cotton layer for residual particle capture. Every layer of media is USA-made, sourced from Kymera International and KDF Fluid Treatment, and tested to NSF/ANSI standards.
How soon will I notice a difference?
How soon will I notice a difference?
Most people notice the chlorine smell is gone from their very first shower. Within the first 3–7 days, skin typically feels less tight and itchy, and hair begins to feel softer. The most noticeable shifts in breakouts, frizz, and scalp irritation tend to happen around the 2–4 week mark as your skin's natural moisture barrier rebuilds without being stripped every day.
Will this lower my water pressure?
Will this lower my water pressure?
No. Sift is engineered so filtration doesn't come at the cost of performance. The layered media is designed to allow full water flow while still capturing contaminants. You won't notice a pressure drop.
How often do I replace the filter?
How often do I replace the filter?
Every 70 days for optimal protection. Lab testing shows Sift maintains over 90% chlorine removal through 5,000 liters of use. After that, performance gradually declines — which is why we offer a subscription that ships your replacement filter before the old one expires. No gaps in protection.
I'm a renter — can I install this?
I'm a renter — can I install this?
Yes. Sift screws on between your existing shower arm and showerhead in under 2 minutes. No tools, no plumber, no permanent changes. When you move, unscrew it and take it with you.
I tried a shower filter before and it didn't work. Why is Sift different?
I tried a shower filter before and it didn't work. Why is Sift different?
Most filters use a single layer of basic carbon or a small amount of KDF — enough to reduce chlorine smell for a few weeks, but not much else. Sift uses a 3-part filtration blend across 5 layers, targeting chlorine, chloramine, heavy metals, sediment, and bacteria. It's third-party lab tested, not just marketed. We disclose every ingredient because we have nothing to hide.