HAVN Wear Review: What the WaveStopper Lab Tests Actually Show

Affiliate disclosure: this post contains a marked affiliate link to HAVN. If you buy through it, Hypertrophy Protocol may earn a commission at no extra cost to you. This is a researched buyer’s guide, not a hands-on test: I haven’t worn these garments. HAVN’s product pages, linked lab reports and policies were checked on October 13, 2026.

HAVN (formerly Lambs) sells everyday clothing with silver fibers knit into the fabric, and says its WaveStopper material blocks 99% of wireless radiation. The short answer from this HAVN Wear review: the fabric does shield radio signals in a lab, but the report HAVN links measured less shielding than its website table at Wi-Fi frequencies, nobody has tested a finished garment on a person, and there’s no controlled evidence that wearing it improves sleep, recovery, HRV, testosterone or fertility. Buy it only if you want silver-fiber clothing for its own sake and accept the premium. Don’t buy it as a recovery tool.

What does HAVN sell?

The US store sells underwear, shirts, hats, sleepwear and home items made with WaveStopper fabric, plus an EMF meter. The boxer briefs are listed as 63% cotton, 32% silver fibers and 5% polyester, with care instructions to wash cold on delicate and hang dry or tumble low.

HAVN US men’s collection and product pages, checked October 13, 2026. Prices change with frequent sales. On that date the boxer briefs showed sizes M, L and XL as out of stock.

What do HAVN’s lab tests actually show?

HAVN’s technology and studies pages list how much radiation the fabric blocks: 99.99% at 700 MHz, 99.98% at 2.4 GHz, 99.95% at 5 GHz, 99.92% at 26 GHz and 99.86% at 40 GHz. The same pages link two radiation reports as their certifications. Reading them changes the picture.

The first, from MET Laboratories, was tested in May 2017 for Spartan SAS of Paris using the IEEE 299 method, which is written for shielded enclosures. The item tested is called “WaveTech,” and the report covers 700 to 5,000 MHz. It measured 39.9 to 44.8 dB of shielding below 1 GHz, but only 21.3 to 29.8 dB between 2 and 3 GHz and 23.6 to 27.8 dB at 5 GHz, depending on the antenna’s polarization.

The second, from EMITECH in France, dated November 2018, isn’t a shielding test at all. It measured how much radio energy a phone deposited into a test model with a 50 by 50 cm fabric sample behind it, at a single frequency of 2,535 MHz, and reported a 99.6% reduction with the fabric directly against the phone.

Decibels make the gap clearer than percentages. Every 10 dB means ten times less signal gets through, so 20 dB blocks 99% of the signal’s power, 30 dB blocks 99.9% and 40 dB blocks 99.99%. HAVN’s 99.98% at 2.4 GHz works out to about 37 dB, and its 99.95% at 5 GHz to about 33 dB. The linked MET report measured roughly 21 to 30 dB in that range, which means somewhere between about 99.3% and 99.9% blocked. That’s still real shielding, but it lets through several to tens of times more signal than the website table implies. Neither linked report covers 26 or 40 GHz, so those two figures have no published source we could find.

Neither report tested a finished garment, a garment on a person, or fabric after washing. HAVN says its silver fibers “cannot be scratched off or washed out,” but it doesn’t publish a wash test.

Does shielding fabric protect your whole body?

No, and HAVN’s tests don’t claim to measure that. A lab shielding figure describes signal passing through a piece of material. A pair of boxer briefs or a T-shirt is open at the waist, neck, cuffs and legs, and the rest of your body isn’t covered at all. Radio signals in a home arrive from many directions and reflect off walls, so a percentage measured through the fabric can’t be read as a percentage cut in what your body receives. The boxer page’s “360-degree coverage” describes the garment, not you.

There’s also a catch with phones. A phone raises its transmit power when its signal is weak. In 2011 the FTC warned that so-called phone radiation shields “may cause it to draw even more power and possibly emit more radiation.” That warning was about phone cases and stickers, not clothing, but the same physics is a reason not to carry a phone wrapped in shielding fabric and assume you’re better off.

Is there a health problem to fix?

HAVN’s marketing assumes everyday wireless exposure is harming you. The evidence doesn’t support that. The FDA states that “the weight of scientific evidence has not linked cell phone radio frequency radiation with any health problems.” A 2024 systematic review of 41 controlled human experiments with 2,874 participants found no or only small non-significant effects of radio-frequency exposure on symptoms including headaches and sleep disturbance, and found that volunteers couldn’t tell whether they were being exposed any better than chance (Bosch-Capblanch et al., 2024). Research continues, and that review covers short exposures, but it’s the best current evidence on the symptoms HAVN markets against.

What about HAVN’s sleep, HRV and fertility claims?

HAVN’s homepage says 63% of polled customers reported better sleep, 78% reported better cognition and mental clarity, and that “pre-studies” show HRV rising by an average of 18%. Its studies page describes an HRV pilot with volunteers aged 25 to 59 and “an increase in HRV of up to 20% within 15 minutes of wearing HAVN.” It gives no number of participants, no comparison group and no published paper, and the 18% and 20% figures don’t match each other.

A poll of people who already bought the product can’t separate the fabric from expectation, a new bedtime routine or simply comfortable clothes. HRV also moves a lot from day to day on its own, which is why a single 15-minute reading proves little; the readiness markers guide explains how noisy it is.

The boxer brief page goes further, saying the garment “shields your fertility from EMF” and that “EMF can significantly reduce testosterone levels.” HAVN provides no trial of its clothing on fertility or testosterone, and its own site states these claims haven’t been evaluated by the FDA and that the products aren’t intended to diagnose, treat, cure or prevent any disease. Convincing evidence would be a blinded trial against an identical-looking garment without the silver fibers, with sleep or hormone outcomes chosen in advance. That study doesn’t exist yet.

The one benefit with a real test behind it: sun protection

HAVN also links a MET Labs UV report (No. U106086R1) run to the AATCC 183-2020 standard, which rated the fabric UPF 50+ both dry and wet, blocking about 99% of UVA and UVB. That’s a genuine, standardized test, and UPF 50+ clothing is a sensible way to protect covered skin if you train or work outdoors. It only covers the skin under the fabric, and the report doesn’t state which garment was tested.

Price, returns and buying details

HAVN offers a 30-day guarantee. The boxer page says you have 30 days after delivery to return it “even if used,” while the homepage says to reach out within 30 days of purchase, so count from the earlier date to be safe. Returns are listed as free on US orders and shipping as free to the continental US. HAVN advertises HSA/FSA eligibility; check with your plan administrator before relying on it.

On value, $78 for one pair of boxer briefs or $148 for a T-shirt is a steep premium over good cotton basics. You’re paying for the silver fiber, and the tested benefits of that fabric are radio shielding through the material and UV protection. HAVN also says silver makes it antimicrobial and odor-resistant, but neither of those is a demonstrated health outcome.

HAVN Wear verdict: who should buy it, and who should skip it?

Buy HAVN if you’ve already decided you want silver-fiber clothing that reduces radio signals through the fabric, you’re comfortable with the price, and you’ll use the 30-day window to judge fit and comfort. The boxer briefs are the cheapest way to try it. Current prices are on the HAVN store (affiliate link).

Skip HAVN if you’re buying it to sleep better, recover faster, raise HRV, protect testosterone or improve fertility. None of that is demonstrated, and the money does more for recovery spent on sleep, training load and food. The recovery window guide covers what actually moves recovery.

If you just want less phone exposure, the free options work better than clothing: use speakerphone or an earpiece, as the FTC suggests, and keep the phone in a bag or on a table rather than in your pocket when you can.

HAVN Wear FAQ

Is HAVN the same company as Lambs? Yes. HAVN’s April 2025 press release announcing a US Air Force research contract identified the company as “HAVN (formerly Lambs).” The two radiation reports it links were commissioned by a French company, Spartan, in 2017 and 2018, before the HAVN name.

Is HAVN legit? It’s a real company with published lab reports, a 30-day guarantee and free US returns. The issue is the marketing, which overstates what those reports show and makes health claims no controlled study supports.

Does washing remove the silver? HAVN says it can’t be washed out but publishes no test after laundering. Follow the care label: cold, delicate cycle, hang dry or low tumble.

Does the Wave Detector meter prove the clothing works? No. A handheld meter shows field strength where you hold it; it can’t measure whole-body exposure or any health effect.

Sources

• HAVN: homepage, men’s collection, Boxer Briefs 2.0, WaveStopper technology, studies page.
• Lab reports linked by HAVN: MET Laboratories EMC94298-IEEE (2017), EMITECH RE510-18-104778-1-A (2018), MET Labs UV report U106086R1.
• FDA, Radio Frequency Radiation and Cell Phones.
• FTC, tips to avoid cell phone radiation scams (2011).
• Bosch-Capblanch et al., Environment International (2024).
• Textile World, HAVN Air Force contract (April 2025).