HAVNHAVN combines material science and advanced performance fabrics to create clothing that blocks 99% of UV and wireless radiation and supports your wellbeing and long-term health. Discover the first protective apparel you’ll actually want to wear.
HAVN (getlambs.com) has 260 customer reviews on Five Star Index, with an average rating of 3.7 out of 5.
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Claim this listingClothing & Underwear · San Luis Obispo, California
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Showing 157 reviews with 5 stars · Clear filters
Jay
It's definitely a quality cap and I really like the gray color. I feel a lot better working with my cap on when I have multiple Wi-Fi routers in the ceiling above me as I work retail.
Response from HAVNOct 13, 2026
Routers in the ceiling for a full retail shift is about the worst setup going, so the cap is earning its keep there. Glad the gray works for you too, Jay.
Paula O.
I can finally sleep all the way thru the night- hasn't happened in 40 years!
Response from HAVNOct 13, 2026
Forty years is a long time to wait for a full night of sleep. Really glad to hear it, Paula.
Deborah P.
The hat helps, but whatever kind of weapon my neighbor has, it still causes me to get a headache.
Response from HAVNOct 13, 2026
Glad the hat is helping, Deborah, and sorry you're still getting the headaches. If you want a hand working out what else around you might be adding to it, our team is happy to talk it through.
Martin M.
Protected my head helped with headaches
Response from HAVNOct 13, 2026
Fewer headaches is the result people care most about. Glad it's working, Martin.
Marilyn B.
I ordered 2 hats, an EMF meter & a lap blanket. When I opened the first hat, in my kitchen (fridge, DW, 2 microwaves, range, 2 computers, 2 phones), and put it on, the world instantly became quiet, except for my spouse talking and the video I was watching. I couldn't believe it! It even reduces my tinnitus when I'm not wearing my hearing aids. I'm also beginning to sleep better, although the hat usually falls off some time during the night. I haven't studied on the meter, yet. I'm also looking forward to using the blanket in bed- I'm planning to put it between my top sheet and comforter.
Response from HAVNOct 13, 2026
That's quite a first impression, Marilyn! Two things: the beanie tends to stay put better overnight than the hat, and when you get around to the meter, take a reading in the kitchen with the hat off, then with it over the meter. The numbers make it obvious.
customer
The technology is what makes the HAVN WaveStopper hat stand out! Its silver-fiber lining is designed to shield against wireless signals from devices like phones and Wi-Fi routers. I appreciate the thought behind combining that technology with an everyday hat, plus antimicrobial properties and UPF 50+ sun protection. A smart, innovative design!
Response from HAVNOct 13, 2026
You picked up on the details most people miss. Getting the silver lining to do three jobs at once, shielding, antimicrobial and UPF 50+, is exactly why it took so long to get right. Thanks for the write-up.
Jocelyn
The hat fits well and I love that it's actually flattering and doesn't look weird
Response from HAVNOct 13, 2026
Flattering was an actual design goal, not a happy accident, so that one lands well. Thanks Jocelyn.
Foutsie
Hat is well made, good quality! Order arrived quite quickly. I feel better wearing it when I spend a lot of time at my computer. I don't actually know if it is working because I have not had it that long, but just knowing I have it on makes me more confident that it is protecting me for the good!
Response from HAVNOct 13, 2026
Appreciate that. On the "is it working" question, you don't have to take it on faith: hold an EMF meter next to your laptop, then put the hat over the meter and watch the reading. Worth doing once so you know rather than hope.