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| mL/gallon | Effective Chlorine Before Filtration (mg/L) | Effective Chlorine After Filtration (mg/L) | Filter Efficiency (%) |
|---|---|---|---|
| 15 | 2.17 | 0.11 | 94.93% |
| 1,000 | 2.20 | 0.53 | 75.91% |
| 2,000 | 2.20 | 0.58 | 73.64% |
| 3,000 | 2.20 | 0.62 | 71.82% |
| 4,000 | 2.20 | 0.51 | 76.82% |
| 5,000 | 2.20 | 0.77 | 65.00% |
| 6,000 | 2.19 | 0.82 | 61.56% |
| 7,000 | 2.19 | 0.80 | 63.47% |
| 8,000 | 2.20 | 0.94 | 57.27% |
| 9,000 | 2.20 | 0.58 | 73.64% |
| 10,000 | 2.20 | 0.55 | 75.00% |
We don't just tell you it works - we show you. Our filters were rigorously tested in acreditied thrid-party labs with results that exceed NSF117 standards for chlorine reduction.
When stacked against top competitors, the Ultimate Shower Head outperformed every brand we tested.
We know that tap water contamination is a major concern for Americans. That's why we've meticulously engineer our system and filtration technology to dramatically reduce your exposure to harmful contaminants like chlorine, PFAS, and microplastics.
Most water municipalities don't remove harmful compounds from your tap water.
Your body can filter them out, but "at the cost of cellular damage" [Gary Brecka].
The easiest way to protect your skin, hair, and overall health is to filter the toxins before they enter you body.
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Study: "Effects of cold-water immersion on health and wellbeing: A systematic review and meta-analysis" (Cain et al., 2025)
Why It's Impressive: Systematic reviews and meta-analyses are the gold standard for evidence, as they compile and analyze data from many individual studies. This specific review focused on the effects of CWI in the general population.
Key Findings: It found a significant reduction in stress observed 12 hours post CWI. It provided evidence for longer-term benefits in a narrative synthesis, including a 29% reduction in sickness absence among participants who took cold showers. It confirmed CWI's effects on sleep quality and quality of life, suggesting significant applications for general wellbeing and stress management.
Study: "Short-Term Head-Out Whole-Body Cold-Water Immersion Facilities Positive Affect and Increases Interaction between Large-Scale Brain Networks" (Yankouskaya et al., 2023)
Why It's Impressive: This study used fMRI (functional Magnetic Resonance Imaging) to look directly at the brain, moving beyond self-reported feelings to show a neurological basis for the "mood boost" from cold plunging.
Key Findings: Participants felt more active, alert, attentive, proud, and inspired after a cold-water bath. The changes in positive emotions were associated with increased coupling (interaction) between brain areas involved in attention control, emotion, and self-regulation. This indicated that CWI may have a profound, integrative effect on key brain functions responsible for mood and focus.
Study: "Cold plunges actually change your cells" (Reporting on a study from the University of Ottawa's HEPRU lab, 2025)
Why It's Impressive: This research goes to the cellular level, suggesting a fundamental biological adaptation rather than just a superficial or temporary effect.
Key Findings: Repeated cold-water immersion for seven consecutive days improved autophagic function (the cell's recycling system). This enhancement allows cells to better manage stress and increases cellular resilience. The authors suggest this could have significant implications for health, longevity, and potentially preventing diseases at a microscopic level.
While we haven't conducted accredited 3rd party testing for all of these specific contaminants yet, we have conducted preliminary in-house testing that shows a significant reduction in PFA's (including compounds like PFOA/PFOS), Heavy Metals (such as Lead and Copper), and other harmful chemicals commonly found in tap water. Our partner, Human Biologist Gary Brecka, advocates for minimizing all toxin exposure, and our commitment is to provide a comprehensive filtration solution. The filter testing data video on this page, featuring Gary, details the efficacy of our core filtration media against key contaminants, demonstrating a powerful reduction in the overall chemical load of your shower water. We are actively pursuing further accredited testing to validate these preliminary results.
We recommend replacing your filter cartridge every 90 Days. This replacement schedule is based on maximizing the efficiency of the advanced filtration media to ensure optimal performance against the contaminants detailed in our testing. Over time, all filter media becomes saturated, reducing its ability to capture new contaminants. Sticking to the recommended schedule ensures you continue to enjoy the benefits of cleaner, less chemically-loaded shower water for your skin, hair, and respiratory health.
Our filtered shower head is engineered for increasing you water pressure. We've designed the filtration system to deliver high flow with maximum contact time for the filtration media, ensuring contaminant reduction without sacrificing your showering experience.
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