the Second Shower Head

Sale price$99
Color: Matte Black

The Science

What 99.9% chlorine removal actually looks like.

Removes Chlorine

99.9% of chlorine is neutralized before water touches your skin.

Engineered to Perform

Vitamin C reacts instantly — consistent from Day 1 to Day 90.

Nourishes Skin & Hair

Five vitamins infused into every shower for softer skin and stronger hair.

NSF/ANSI 42 Certified*

PP sediment filter independently tested and certified to NSF/ANSI 42 standards.

The Technology

Unlike typical filters, ours never stops working.

Vitamin C reacts with chlorine on contact — a consistent chemical reaction that doesn't degrade over time like KDF and carbon filters.

  • Vitamin C neutralizes chlorine on contact
  • Consistent performance from Day 1 to Day 90
  • No degradation — unlike KDF and carbon
Learn More

The Journey

Benefits that build over time

Here's what to expect with daily use of your Second Shower filter.

See Clinical Data →
Day 1

Instant chlorine removal

From your very first shower, 99.9% of chlorine is neutralized. You'll feel the difference in water softness immediately.

Week 1–2

Skin feels calmer, less tight

Without daily chlorine exposure, your skin's natural moisture barrier starts recovering. Less dryness after showering.

Month 1

Visible hair and scalp improvement

Hair retains more natural oils. Reduced breakage, less frizz, and color-treated hair stays vibrant longer.

Month 2–3

Full skin and hair transformation

Your skincare products work better. Hair is noticeably stronger. The difference is clear — and so is your filter's Truth Window.

Day 1 — Instant chlorine removal — Second Shower filtered water results Week 1–2 — Skin feels calmer, less tight — Second Shower filtered water results Month 1 — Visible hair and scalp improvement — Second Shower filtered water results Month 2–3 — Full skin and hair transformation — Second Shower filtered water results

99.9%

Chlorine removal

5

Vitamin infusion

NSF-42

Certified

15%

Subscribe & save

Removal rate. First day to last.

The Science

99.9%

Removal rate. First day to last.

Second Shower (Vitamin C)Ours

Day 1
99.9%
Day 60
99.9%

Typical KDF / Carbon Filter

Day 1
~70%
Day 60
<10%

Vitamin C neutralizes chlorine chemically. The reaction never stops working.

The Comparison

How Second Shower
Compares.

Our Pick
Second Shower
KDF / Carbon Filters
Clinically tested & NSF/ANSI 42 certified*PP sediment filter
Consistent performance over full lifespanNo degradation at Day 60
Removes 99.9% of chlorine
Infuses vitamins into water
Transparent filter with Truth Window
Maintains water pressure176 precision micro-jets
Works with any standard shower arm

*PP sediment filter certified to NSF/ANSI 42 standards. Chlorine removal claims based on independent laboratory testing of Vitamin C filtration.

Subscribe & Save

Clean water, delivered.

Your First Order

The Welcome Kit

Everything you need to get started: showerhead, first filter, and installation guide.

Showerhead
Showerhead
First Filter
First Filter
Install Manual
Install Manual

Sustainable Refills

Fresh filters, on schedule

2-pack filters delivered every 2 months. Cancel or pause anytime.

First Purchase
Month 2
2-pack filters
Month 4
2-pack filters

The Standard

Rigorous testing that
sets a higher standard.

*Micron PP sediment filter certified to NSF/ANSI 42 standards. 99.9% chlorine removal via Vitamin C tested independently. Engineered to exceed industry standards for water filtration.

NSF/ANSI 42 Certified*

PP sediment filter independently tested and certified to NSF/ANSI 42 standards for particulate reduction and material safety.

Lab-Verified 99.9%

Third-party laboratory testing confirms 99.9% free chlorine removal.

Safe Materials

Food-grade Vitamin C and medical-grade components. No heavy metals.

Engineered in Seoul

Designed and precision-engineered in South Korea with 176 micro-jets.

Getting Started

Three steps. Sixty seconds.

1

Unscrew Filter Chamber

Grip the filter housing below the Truth Window and turn counter-clockwise.

2

Swap the Filter

Pull out the used filter. Insert new filter with mesh side facing down.

3

Reassemble & Flush

Screw the chamber back on. Run water for 30 seconds to flush. Done.

Questions?
We're here to help.

How is this different from a basic shower filter?

Most shower filters use carbon (KDF), which loses effectiveness within weeks and can't guarantee 99.9% chlorine removal across the filter's life. Second Shower uses food-grade Vitamin C — the same ascorbic acid hospitals use for dechlorination. It neutralizes chlorine through a direct chemical reaction, so removal stays at 99.9% from Day 1 to Day 120. Our PP sediment filter is also independently certified to NSF/ANSI 42 standards — that costs $15,000–$30,000 and takes 6–12 months. Most brands skip it. We didn't.

Will it lower my water pressure?

No. 176 precision micro-jets distribute the flow evenly across the spray face, so you get full coverage at standard residential pressure. Most customers actually describe it as feeling stronger because the stream is more focused. If you're in a low-pressure home, the spray geometry is designed to compensate — no booster needed.

How long does the filter last?

Every 2–4 months for the wall-mount Showerhead. You don't have to guess — the Truth Window shows you exactly when. The filter darkens as it captures sediment and metals, and the white Vitamin C powder in the lower chamber clears as it depletes. Subscribe and we deliver a 2-pack every 120 days for $36 (vs $39 one-time). Skip, pause, or cancel anytime.

Will it fit my shower?

Yes. It threads onto any standard 1/2" NPT shower arm — that's 99% of showers in the US. No tools, no adapters, no plumber. Installation takes about 60 seconds: unscrew your old head, wrap the included plumber's tape, hand-tighten the new one. If your setup is unusual, send a photo of your shower arm to hello@secondshower.us and we'll confirm before you buy.

What does NSF/ANSI 42 certified mean?

Our filter has two stages. The PP sediment filter is independently certified to NSF/ANSI 42 — a third-party standard for particulate reduction and material safety. The Vitamin C gel matrix handles the 99.9% chlorine removal, tested independently at real shower conditions. Two different mechanisms, both verified by labs that aren't us.

What is the Truth Window — what am I supposed to see?

It's a transparent chamber built into the filter housing. You watch filtration happen in real time: sediment, rust, and heavy metal particles collect in the upper chamber as your water passes through, and the white Vitamin C powder gradually clears as it neutralizes chlorine. No marketing claims required. You see exactly what was in your water — and what isn't anymore.

My skin felt drier in the first few days. Is something wrong?

No — this is normal, and it's actually a good sign. Chlorinated water leaves a slippery residue that mimics "moisture." When we strip the chlorine out, your skin feels its actual cleaner state for the first time, which can read as tighter at first. Most people adjust within 2 weeks. Tips: use slightly cooler water, apply a light moisturizer after showering, and use about 30% less shampoo (it lathers more without chlorine interference).

What if it doesn't work for me?

30-day returns, no questions asked. Every device is also covered by a lifetime warranty against manufacturing defects. We'd rather refund a filter you don't love than keep a customer who isn't seeing results — that's why the Truth Window exists in the first place. Free shipping over $40, ships within 1 business day.

One filter. One look. You'll know.

One filter. One look. You'll know.

The truth window shows you what's been in your water. That's all it takes.

Shop now
Free shipping over $40 30-day returns NSF/ANSI 42 certified*