Duo Filter+

3,576+ Reviews

The filtered shower for calmer skin and stronger hair.

Duo Filter+

Duo Filter+

Matte Black
Prix promotionnel  €89,99 Prix régulier  €149,99
Passer aux informations sur le produit
Duo Filter+

Duo Filter+

3,576+ Reviews

The filtered shower for calmer skin and stronger hair.

Clinicians’ Choice419 clinicians share this on FrontrowMD without compensation.

Two-stage filtration removes the chlorine, PFAS and sediment your skin and hair meet every shower.

CouleurMatte Black
LAB
TESTED
FREE
SHIPPING
30-DAY
RETURNS
SECURE
CHECKOUT
How does the subscription work?
  1. Today

    Your starter kit

    Your Duo Filter+ and first cartridge ship within 24 hours and arrive in 6–8 business days — tracking included.

  2. Every 30 days

    Your refill

    A fresh cartridge is delivered to your door automatically, so filtration never drifts past peak performance. No reminders, no guessing, no rundown — and you’re only charged when each cartridge ships.

  3. Flexible

    Your subscription

    Pause, skip a delivery, change your address or cancel — anytime, in one click, from the link in your confirmation email. No lock-in, no fees.

Test & Results

Every claim on this page is backed by an independent lab, not a marketing team.

  • 99% of chlorine removed — certified to NSF/ANSI 177
  • 99% of PFAS (“forever chemicals”) removed — certified to NSF/ANSI 53
  • 99% of particulates (rust, sediment, pipe debris) removed — certified to NSF/ANSI 42
  • Built with low-lead materials certified to NSF/ANSI/CAN 372

See the full third-party test reports — batch data for chlorine, PFAS and particulates →

Technology

Two stages, doing two different jobs.

  • Stage 1 — Sediment filter. A dense mesh layer catches rust, sand and pipe debris before it reaches your skin or hair.
  • Stage 2 — Activated carbon. Chlorine and PFAS molecules bind to the carbon and stay there, not on you.

No batteries, no app, no maintenance beyond swapping the cartridge. Screws onto your existing shower arm in under 2 minutes.

Product Specs
  • Filtration: two-stage — sediment + activated carbon
  • Flow rate: 2.8 GPM
  • Cartridge replacement: every 30 days for lab-verified peak filtration
  • Fitting: universal ½″ thread — fits any standard shower arm
  • Dimensions: 22 × 6.2 × 9.5 cm · Weight: 340 g
  • Finishes: Arctic White, Midnight Black, Petal Pink
Issues We Address

For your skin: tightness and dryness after showering, redness and irritation, breakouts linked to mineral and chemical buildup, a compromised skin barrier.

For your hair & scalp: frizz and brittleness, a dry and flaky scalp, faster colour fade, excess shedding and breakage.

Chlorine and dissolved metals are common, well-documented irritants for skin and hair. Removing them is the first step — not a miracle cure.

Read how shower water affects your skin and hair →

Have a question? Check our FAQ →

  • NSF/ANSI Certified
  • Independently Lab-Tested
  • Universal Fit — No Plumber
  • 30-Day Money-Back Guarantee
  • Ships Within 24 Hours
Rigorously tested

Chlorine

Tested by an independent laboratory:
NSF/ANSI 177

Chlorine disinfects tap water, but it also strips the natural oils from skin and hair — leaving both dry, tight and prone to breakage.

PFAS

Tested by an independent laboratory:
NSF/ANSI 53

PFAS (“forever chemicals”) don’t break down naturally and have been linked to hormone, immune and reproductive problems.

Particulates

Tested by an independent laboratory:
NSF/ANSI 42

Rust, sediment and pipe debris travel through ageing infrastructure before they ever reach your shower — and your skin.

Materials

Certified by an independent laboratory:
NSF/ANSI/CAN 372

Every material in contact with your water is certified low-lead, so the filter itself never becomes part of the problem.

Designed around two things: your skin and your hair.

Calmer, more comfortable skin

Calmer, more comfortable skin

Chlorine strips your skin’s natural barrier, leaving it dry, tight and reactive. The Duo filters it out before it reaches you — relief that lasts well after the water’s off.

Stronger, healthier-looking hair

Stronger, healthier-looking hair

Chlorine and dissolved metals rough up the hair cuticle and fade colour fast. Removing them helps hair hold on to moisture, softness and colour.

Fits the shower you already have

Fits the shower you already have

No new showerhead, no plumber. The Duo installs between your arm and your existing head in under two minutes.

See it in action

Real routines — tag @norde to be featured here.

Install in under two minutes.

See the full guide
Step 1
1

Unscrew your current showerhead and wrap the included plumber's tape around the base of the Duo.

Step 2
2

Hand-tighten the Duo onto your shower arm. No tools, no plumber, no drilling.

Step 3
3

Screw your showerhead back on top, run the water for three minutes to flush the filter, and enjoy.

Customer Reviews

What people notice after their first shower.

4.8 Trusted in 65,000+ households
FAQ

Got questions?
We've got answers.

What exactly does the Duo filter remove?
Independent lab testing confirms 99% chlorine reduction (NSF/ANSI 177), 99% PFAS reduction (NSF/ANSI 53), and 99% particulate reduction — rust, sediment, pipe debris (NSF/ANSI 42). Full lab reports are available on request.
Does it soften hard water?
No. The Duo is a filter, not a softener — it removes chlorine, PFAS and particulates, but it doesn't remove the dissolved minerals (calcium, magnesium) that cause water hardness. If hard water is your main concern, a softener addresses a different problem than this filter does.
Will it reduce my water pressure?
Barely. The Duo is rated for a 2.8 GPM flow rate, in line with a standard showerhead. Most customers report the difference is unnoticeable once the filter is flushed after install.
Is it safe for color-treated or chemically processed hair?
Yes — and it can help. Chlorine oxidizes hair color and speeds up fading. Filtering it out before it reaches your hair is one of the simplest ways to help color hold longer between salon visits.
What is the filter housing made of? Is it safe?
Every material in contact with your water is certified low-lead to NSF/ANSI/CAN 372. It's built to sit in your shower daily without becoming part of the problem it's solving.
  • 5 stars: 130 (91%)
  • 4 stars: 13 (9%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
N
Nanyely Munoz

I love it. I never thought I'd need this so much, I've truly fallen in love with it. It's so cool, beautiful, and functional that it will definitely be a part of my routine. Thank you so much!

P
Parker Wright

Easy installation, does its job. So far I have been very satisfied with this filter. It was easy to install in my apartment shower, and its lower profile doesn't impact the shower filter height that much. As a 6 ft individual, I still don't have to crouch. I'm at the 6-month mark and will change the filters soon. Overall, happy with it.

I
Igor Jankovski

Good filter. Works well; water doesn't taste like metal anymore.

M
Michael

First time shower filtering. I live in Austin downtown area, by annual water reports our water have chlorine and disinfection byproducts so I thought that I don't need that in my life, especially when I already have a countertop RO system. The installation was easy even plumbing tape was also a nice touch. So far so good!

A
Abraham

10/10 recommend to anyone

B
Bree W.

Worth the investment. Love my new filter. Definitely worth the investment.

M
McKenzie O.

A staple in my routine. Ever since switching, I notice a huge difference in my skin and hair. Getting out of the shower and not having to immediately moisturize is so nice.

S
Sara

Felt noticeably cleaner after first shower. We have water with an excessive mineral content and this filter is a game changer. About to order a replacement filter. Very happy.

W
William J.

Superior quality. Much easier to install and way better quality than my previous plastic filter. The cartridges are also superior in make and filtration. Built to last. Very happy, and my hair feels noticeably cleaner.

H
Heather B.

Feeling clean. Thankful for this product! My skin in the Colorado weather is staying soft and allergy free.

N
Nicole B.

The best. Easy to install, great pressure, high quality product. Leaves hair and skin softer with less shedding.

R
Rena I.

My hair doesn't fall out as much. I contemplated trying this for a while. Once I had it installed I became a believer in cleaner, healthier water for my hair and body. I can definitely tell the difference between regular shower water and the filtered water. Worth every dollar.

D
Dallas

Good product so far. Had the filter about a week, seems to be working fine. The white filter looks extremely brown now

L
Leslie K.

Buy it for better hair. I don't normally write product reviews. But this product is truly amazing. I installed it a couple months ago and have recently noticed how thick and healthy my hair feels, even confirmed under a microscope at a head spa visit. I am well into my 60s and this is the only change I've made. I am a true believer.

S
Sara N

Scary good. Received the filter on 08/20. I could tell a difference in my skin after the first shower and could see a difference in the filter color as well. (1st photo) The white filter was dark brown by day 3 (2nd photo) and I had to change it on 08/30 (3rd photo). I had no idea the water was that bad, but I knew something was off by the condition of my skin. This was the best purchase I've made for my wellness this year.

V
Viviana Torres

Has reduced the appearance of my KP. I've suffered with keratosis pilaris for years and nothing seemed to work. After some research I realized the water I shower with may be contributing, especially the high concentration of chlorine. After a couple weeks of using this filter I finally noticed less bumps and redness. Continuing to use it plus moisturizing has helped so much.

A
Andrea S.

Absolutely in love. Since changing to this it has helped me so much with my hair shedding and falling. I didn't know what else to do and it actually worked for me. I'm obsessed with it.

J
Jessica A.

Usually avoid subscriptions but not this one. Typically I avoid subscriptions because most companies make them difficult to manage. This one is easy. I access my account frequently because sometimes I need my cartridge sent sooner, and I've skipped a shipment once when I accidentally stocked up. I can't say enough how much I appreciate the product and the ease of managing my shipments.

A
Alice E.

Love how my hair and skin feel after switching.

M
Mona Bollinger

Shower filter excitement. It's the little things that do great things and I couldn't be happier with my decision. Easy to install and I can already tell the difference just in the chlorine odor being non-existent. It's been a week and I feel so much better knowing I'm getting healthier water to cleanse with.

C
C. Liao

Great water! I just wanted to try this product but it worked out really good for my skin, love it and will need to get more.

W
W.L.

Fabulous improved water quality. The water is noticeably sweeter, less metallic, and feels better to shower in. Thanks!

H
Hadley L.

Absolutely loved! I feel so clean when I use it. It leaves my hair feeling fresh, my face feeling clean and I always just feel so nice when I get out of the shower. So happy to get in!

I
Ilya

Good water pressure! Easy to install. Clear design to see filter usage

D
Deborah Redanz

Love this filter. We just installed this shower filter and immediately noticed the difference. I think we had a lot of chlorine in our water and who knows what else. Very pleased with it so far!

E
Evelyn

Fantastic filter. I was concerned about setting it up but it was honestly extremely easy. As far as the filter goes it's amazing, my hair felt super soft after and my skin as well. My skin also feels so much cleaner, it's crazy. My dry skin from the chlorine immediately stopped after one use. Make sure you take your time installing and tighten it well. No leaking, no issues here.

A
Agris

Very good. I was really happy that they think about the customer. They even included plumber’s tape.