A better understanding of what's in your water. And filtration designed to match it.

Water isn't the same everywhere. Across America, aging infrastructure, local treatment methods, and regional water sources create meaningful differences from one home to the next. That's why VESL exists.

Our mission is to bring cleaner water to every home, starting with showers, through products that are backed by science, thoughtfully engineered, and affordable for everyday families.

Investigate the water
Formulate the filter
Publish the evidence
Price within reach
Why water differs

There's no such thing as average water.

Two households a few hundred miles apart can be showering in water that started in different places, was treated with different chemistry, and travelled through pipes of very different ages to get there. Filtration is almost always sold as a single answer to all of it. That gap is the reason this company exists.

Regional water source — reservoir, river, or wellhead
Source

Regional water sources

Surface water from a river or reservoir behaves differently from groundwater pulled out of an aquifer. The starting chemistry differs before a single treatment step happens, and that difference carries all the way to the tap.

Local water treatment infrastructure
Treatment

Local treatment methods

Municipal systems principally use free chlorine or chloramine. They are not two versions of the same thing. They are different chemical problems, and they call for different filtration chemistry to address.

Ageing pipes and service lines water travels through
Infrastructure

The pipes it travels through

Water quality at the plant and water quality at your showerhead are two different measurements. Cities across the country are investing heavily in ageing systems, and what happens between the plant and the tap varies enormously in the meantime.

The problem we're solving

Everyone gets about a second. What happens inside it is engineering.

Every filter works by holding water against a material long enough for a reaction to finish. A fixture you can install yourself gives it roughly a second, which rules out most of what this industry uses. Two things decide what's possible in that second: what the water meets, and how long it meets it. This category treats both as fixed. We treat both as engineering problems.

What conventional chloramine chemistry needs
Minutes
About one second
What a showerhead gives a filter

Illustrative. Not drawn to scale.

Disinfectant oneFree chlorine
Reduces readily. Conventional shower filtration media are built around it, and it's what our current formulation is designed for.
Disinfectant twoChloramine
Reacts far more slowly. Conventional approaches require contact times measured in minutes, which a showerhead does not have.
The constraintAbout one second
That's what a showerhead has to work with today. It's why no fixture-scale product handles both disinfectants, and why more material in a small housing doesn't close the gap.

A chloramine solution at fixture scale is our next engineering objective, and it's active work rather than an aspiration. That's the problem VESL exists to solve.

Where we are today

Our current filter is designed for free chlorine, the disinfectant most municipal systems use. We won't claim chloramine performance until an independent lab confirms it.

Our technical bench

An MIT chemical engineer designed our testing. He holds us to it.

Dr. TJ Joo, scientific advisor to VESL
TJ Joo, PhD
Scientific Advisor
PhD, Chemical Engineering, MIT
Postdoctoral research, Stanford University

Designed the protocol our filtration is tested against and reviews the results. His condition for advising was that the testing be rigorous and the claims be honest.

From our advisor

"Most people think about what's in their drinking water. Almost no one thinks about what they stand under."

Chlorine, hard-water minerals, and dissolved metals from ageing pipes are real, routine, and overlooked exposures. The shower is the most direct daily contact most adults have with their tap water, and it happens at the temperature where chlorine evaporates most easily.

Dr. Joo designed the protocol our filtration is tested against. The testing itself is run by an accredited third-party laboratory and is currently underway. Results will be published with the lab's name and methodology when the work is complete, and we publish removal percentages when we can publish the data behind them. Dr. Joo advises VESL; university affiliations are listed for background and do not indicate institutional endorsement of VESL.

How we work

Three rules. No exceptions.

The standards his protocol is designed against, and the ones every claim on this site has to clear.

01
Third-party testing, published

Who ran it, what protocol they followed, and at what flow rate, published alongside the number.

02
Built for a named water profile

Every formulation targets a specific kind of water, and we say which kind. Today that's free chlorine systems.

03
Decay curves, not day-one numbers

Performance across the full life of the cartridge, not the best hour of it.

What's in the Filter

Powered by VESL SPA Pod™

Soften · Purify · Activate

Our copper-zinc purification media, chlorine-reducing sulfite media, and mineral-conditioning complex work together to help soften the feel of water, reduce common shower-water impurities, and leave every rinse feeling cleaner and more refreshed.

VESL filter cartridge
Inside the cartridge
Pre-filtration
Steel mesh + PP cotton — captures sediment before water enters the bed
The bed
Three ingredient groups — detailed below
Post-filtration
PP cotton + steel mesh — final particulate capture before water exits
01 /
Copper-Zinc Purification Media
A blend of copper and zinc that creates a redox reaction as water passes through. This is the workhorse of the cartridge, originally developed for industrial water treatment and now miniaturized for residential cartridges.
02 /
Chlorine-Reducing Sulfite Media
A calcium-based sulfite compound that targets the chlorine compounds municipal water plants leave behind. Particularly relevant for hot showers, where chlorine evaporates most easily into the air you breathe.
03 /
Mineral-Conditioning Complex
A blend of mineral materials including alkaline ball, maifan stone, and antibacterial ceramic. Works with the cartridge's two purification stages to leave the water feeling balanced and the rinse feeling cleaner.

The three ingredient groups are blended together in a single chamber rather than stacked in sequence — so every drop of water contacts all of them at once. This is the setup our advisor recommended for daily shower use.

What's next

The shower is the first room, not the last.

What we've shipped, what's in development, and what comes after it.

Shipping now
Filtered showerhead with the SPA Pod cartridge, designed for free chlorine systems.
In development
A chloramine formulation that works at fixture contact times.
Next
Household water products beyond the shower.
Ongoing
The Characterization Initiative: what's in the water, system by system, published as we confirm it.
Get the findings first
Start with your own city. We'll send the findings as they're confirmed.
VESL filtered showerhead
The first product

The VESL Showerhead. Serious filtration, at an affordable price.

A filtered showerhead built around the VESL SPA Pod™ cartridge, which ships pre-installed and is designed to reduce free chlorine while conditioning water for a cleaner, more enjoyable shower. Hand-tightens onto a standard half-inch shower arm in about five minutes. It's the first step toward a broader vision of smarter water throughout the home.

Showerhead, with a quarterly filter subscription
$69
Showerhead on its own, no subscription
$99
Replacement SPA Pod cartridges, on subscription
$29 / quarter
First-year total, with subscription
$156

First cartridge pre-installed. Free U.S. shipping, ships in one to two business days. 60-day money-back refund. Cancel the subscription anytime. Cartridges are $35 each without a subscription.

Flow rate1.8 GPM, certified
FittingStandard ½" NPT shower arm
Cartridge life90 days
ListingsDOE CCMS certified · CEC MAEDbS registered · cUPC listed, IAPMO #11428