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HAIR & SKIN
SKINCARE ESSENTIAL
PATENTED TECH
#1 Korean Collagen Mask
5 MODELS
RadianceFlow™ Filtered Showerhead
Healthier hair & skin starts with cleaner water.
★★★★★
4.8 | 1,214 verified reviews
15-stage filtration with a Vitamin C + Alkaline Ion core removes the chlorine and heavy metals that dry out your scalp and weaken every strand — so your rinse finally works with your hair-growth routine, not against it.
Reduces chlorine, rust and heavy metals in every rinse
Softer, shinier hair and a calmer, less itchy scalp
Preps the scalp for your Kiierr laser cap session
Finish
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Filter refill $29 every 90 days · skip or cancel anytime
$99
$139
One-time purchase
Includes first filter · replacements $39 each
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What's in the box
RadianceFlow showerhead
One 15-stage filter cartridge (already installed inside)
Plumber's tape
Quick-start card
Specs & fit
Fits any standard ½" U.S. shower arm
Color: black or stainless steel
Filter Life: 90 days / ~10,000 gallons
Shipping & returns
Free shipping within the U.S. (arrives in 2–3 business days after 1–2 day processing)
International shipping available; duties may apply
Backed by a 90-day satisfaction guarantee
Must be used consistently for the full 90 days
Return requests accepted within 15 days after the trial period
See Return Policy details here.
AS SEEN IN
Clearer skin. Healthier hair.
112 people swapped their showerhead for RadianceFlow and changed nothing else about their routine. Here's what they noticed after 30 days.
93
%
said their hair felt softer and easier to detangle
87
noticed less hair in the drain and on the brush
89
reported clearer, more radiant skin
9
/10
would recommend it to a friend
Most people spend 10 minutes a day rinsing their scalp in pool water.
Municipal water carries roughly the same chlorine as a swimming pool, plus rust, copper and dissolved minerals. Hot water opens the cuticle, and all of it goes straight in.
Chlorine strips the scalp barrier
Oxidizes the natural lipids that keep skin calm — the itch, flakes and tightness you blame on shampoo.
Minerals and metals coat the strand
Buildup dulls shine, weighs fine hair down and makes it snap at the brush instead of bending.
An irritated scalp sheds more
Inflammation shortens the growth phase. Treating the water is the lowest-effort change you can make for it.
Follow a drop of water through all fifteen stages.
Tap a layer of the cartridge to see what it does.
Tab 1
1–2
Mesh pre-filter
3–5
KDF-55
6–7
Vitamin C core
8–12
Alkaline ion core
13–15
Carbon polish
↓
What reaches you
The grit never gets in.
Water hits a stainless mesh and a PP cotton screen first. Rust flakes, sand and pipe scale stop here, before they can reach the media — or settle onto fine hair and leave it feeling gritty and dull.
1
Removes
Rust
Sand
Pipe scale
Metals and chlorine, out by chemistry.
KDF-55 copper-zinc granules swap electrons with lead, mercury and free chlorine, turning them into harmless compounds. Calcium sulfite keeps working in hot water, where carbon alone gives up.
2
Lead
Mercury
Free chlorine
The Vitamin C core.
An ascorbic acid cartridge neutralizes chlorine and chloramine on contact — including the chloramine most carbon filters let straight through. It’s the stage you feel first: less tightness, less itch.
3
Chlorine
Chloramine
The Alkaline Ion core.
Tourmaline, maifan stone and alkaline ceramic nudge pH toward skin-neutral and release negative ions. Water feels softer on the scalp and rinses cleaner from the strand, so conditioner can do its job.
4
Harsh pH
Mineral residue
A final polish.
Activated carbon and a microporous cotton layer take out odor, residual taste and any remaining fines before water reaches the face plate. It’s the last thing between the cartridge and your scalp.
5
Odor
Remaining fines
Water your scalp can recover in.
Chlorine-free, pH-balanced, metal-free — every rinse, for 90 days per cartridge. Then a fresh one shows up at your door before you’d think to order it, so the water never quietly slides back.
6
Installs in 2 minutes. No plumber, no tools.
Fits any standard ½" U.S. shower arm. Keep your old showerhead in a drawer — you won't need it.
Remove the old head, wrap the tape
Twist it off by hand, then two turns of the included tape around the threads.
Screw on RadianceFlow
Thread it onto the arm and hand-tighten. Snug is enough.
Run it for 60 seconds
Primes the filter media. Then shower like you always do.
“Chlorine is an oxidant. Rinsing in it every day quietly strips the lipid barrier that keeps a scalp calm. For patients worried about shedding, filtering the shower is the easiest change I recommend — and the one they actually stick with.”
Dr. Debra Shelby
Board-certified dermatologist
See how real customers use RadianceFlow every day.
4.8
94% rate it 5 stars
94% rate it 5 stars · 1,214 reviews
“Less hair in the drain by week three. I was not expecting that.”
Maya R. · Verified buyer
“I use it with my 272Premier. Scalp stopped itching after the cap.”
Daniel K. · Verified buyer
“Color lasts longer between salon visits. Pressure is actually better.”
Priya S. · Verified buyer
“Two minutes, no tools. Easiest upgrade I've made to my bathroom.”
Tom W. · Verified buyer
Finally, a filter that doesn't kill pressure
Tried two others that turned my shower into a drizzle. This one feels stronger than the stock head and my hair is noticeably softer.
Lauren M. · Austin, TX · Verified buyer
Part of my regrowth routine now
I've used the Kiierr cap for a year. Adding this was the first thing that calmed the flaking around my hairline. Wish I'd started with it.
Marcus D. · Chicago, IL · Verified buyer
My colorist asked what I changed
Six weeks in and my color hasn't gone brassy, my scalp stopped flaking, and I'm pulling way less hair out of the drain. Install took two minutes and the refill just shows up every three months.
Elena V. · Denver, CO · Verified buyer
Step one of your laser cap routine happens in the shower.
Low-level laser therapy works on follicles it can reach. A scalp free of chlorine irritation and mineral buildup gives light a clearer path and keeps the skin calm between sessions.
Morning
Rinse
Shower as normal. Nothing new to remember.
Dry
Towel & air dry
Dry your hair. The laser cap works best on clean, dry hair.
Evening
Cap session
Use your laser cap on its normal schedule (depends on model)
Shop laser caps →
Before you decide.
Anything else? Email our hair specialists at service@kiierr.com
Will it lower my water pressure?
No — most people say it feels stronger. The face is pressure-balanced at 1.8 GPM and the media bed is sized so water never has to squeeze through a single puck of carbon.
How often do I replace the filter?
Every 90 days, or about 10,000 gallons — sooner if your household showers a lot. Subscribers get a fresh cartridge mailed on schedule; the swap takes about 30 seconds.
Can I use it the same day as my laser cap?
Yes. Rinse, dry fully, then do your session. Many customers find a chlorine-free rinse makes the scalp less reactive after capping.
Is it safe for color-treated or keratin-treated hair?
It's better for it. Chlorine and copper are the main reasons color fades and brightens to brass. Removing them is why colorists recommend shower filters in the first place.
Does it soften hard water?
Yes. While it isn’t a full softener, RadianceFlow noticeably reduces the effects of hard water. Minerals in hard water often leave behind residue that clogs pores, weighs hair down, and dulls skin. RadianceFlow reduces chlorine and metals, balances minerals, and restores pH with the Vitamin C + Alkaline Ion Core. The result: fewer breakouts, less dryness, healthier scalp comfort, and hair that feels light, smooth, and easier to manage—even in hard water regions.
Will it fit my shower?
Almost certainly. The universal half-inch thread fits the vast majority of US showers, whether fixed or handheld. From apartments to homes, the Kiierr RadianceFlow provides a seamless, immediate upgrade without special adaptors.