How to choose a laser cap: 8 checks before you buy

1. The FDA wording, word for word

Start with the product page, not the ad. Every device on our list says it is FDA-cleared, but the wording varies: iRestore writes "FDA 510(K)-cleared", Kiierr "FDA cleared & effective for men and women", HairMax "FDA Cleared*" with an asterisk to a list of indications. Look for the indication too: the stages of hair loss and skin types the device is cleared for. If a seller says "FDA registered" or "FDA approved" for a home laser cap, be careful: registration is not clearance, and caps are cleared, not approved. Our guide to what clearance means explains the difference.

2. The routine you will actually keep

This is the check most buyers skip and most regret. Caps come in two families. "Short" caps run 6 minutes a day (Capillus, Kiierr 302) or 7 minutes three times a week (HairMax PowerFlex). "Long" caps run 25 to 30 minutes every other day (Kiierr 272, illumiflow, iRestore helmets). Think about your week. Do you have a fixed evening slot on the couch? A long session is fine. Is your day unpredictable? Go short. Our formula weighs weekly time at 15%, and you should weigh it more if you know yourself.

Our pickiRestore Professional

It clears all eight checks except cordless use: 282 light sources, a fee-free 12-month guarantee, a 2-year warranty and $799 on November 11, 2026.

9.4Excellent$799checked Nov 11, 2026

Check price at iRestore ↗Read the review

3. Light sources: count, kind and wavelength

More light sources cover the scalp more evenly. Caps here carry 148 to 312 lasers; the iRestore helmets add LEDs to reach 120 to 500 light sources. Most use red light at 650 to 655 nm; a few add other wavelengths (Capillus Spectrum 808 nm, iRestore Elite 625 and 680 nm). Whether lasers beat LEDs is a brand argument we do not settle; we count both. One rule of thumb: compare like with like. A 272-laser cap at $849 and another at $1,799 give you the same count; the difference is in routine, warranty and terms.

4. Cordless or plugged in

Cordless caps let you move: make breakfast, fold laundry, walk the dog in the yard. Kiierr, illumiflow, Capillus, HairMax caps and REVIAN all run on batteries, and so do Theradome's helmets. iRestore's helmets plug in as listed (the Elite has a $99 battery option). If you know you will sit for every session anyway, a corded helmet costs you nothing in practice, and the iRestore Professional is the best value on our list.

5. The money-back terms, including the fees

This is where the real differences hide. On November 11, 2026:

• iRestore: 12 months, per its return policy.
• illumiflow: 12 months, refund minus a 25% fee.
• Kiierr: 7 months (use 210 days, return between day 210 and 240), 25% fee unless you provide 7 months of photos, before photo registered within 45 days.
• Capillus: 6 months, only on orders from capillus.com.
• HairMax, Theradome, REVIAN: 6 months (Theradome offers 12 through its quiz; REVIAN says 100%).

Brands talk about results in months, so a longer, fee-free window protects you best. Our formula takes 1.5 points off for any fee or condition.

6. Warranty years

A cap is a battery-powered gadget you will use hundreds of times. Capillus gives 3 years, the iRestore Elite 3, most others 2, and HairMax and Theradome 1. The illumiflow 148 and REVIAN RED pages did not state a warranty length when we read them, so ask before you buy. Kiierr and illumiflow sell 5-year extensions for $99, which is worth considering on a $1,000-plus cap.

7. Fit and head size

Check the circumference before you order. Kiierr's 272 Premier and illumiflow's caps fit up to 23.5" (both sell XL versions for 24.5"), Kiierr's 302 fits 23.5" to 24", Capillus's regular caps up to 23". REVIAN lists the widest range, 21.26" to 25.20". Measure around your head just above the ears and eyebrows with a soft tape.

8. The price on the day

Prices in this category move a lot. On November 11, 2026, Kiierr, illumiflow, iRestore and Theradome were on sale pricing, 20% to 54% off their regular prices, while Capillus, HairMax and REVIAN showed their regular prices. Our scores use the price we saw, and we date every price on the site. Before you buy, open the brand page from our buttons and check today's figure. If a sale has ended, a device can drop several places in our ranking.

Five mistakes buyers make

We read a lot of buyer questions while researching this guide, and the same mistakes come up again and again.

1. Buying the biggest number. A 500-light helmet is not automatically the right choice if its price means you will resent it, or its routine does not fit your life. Light count is one line out of seven in our formula for a reason.
2. Ignoring the refund small print. A "12-month guarantee" with a 25% fee returns less than a fee-free 6-month one on a cheaper device. Do the maths in dollars before you trust the headline.
3. Buying from a third-party seller to save a little. Capillus, for one, only honors its satisfaction guarantee on orders from capillus.com. Marketplace listings may come with different terms, or none.
4. Judging too early. Brands talk in months. Deciding after six weeks, in the bathroom mirror, is how good devices end up in a drawer. Monthly photos, same light, same angle.
5. Skipping the doctor. The clearances cover pattern hair loss within set stages and skin types I to IV. Sudden or patchy shedding needs a diagnosis first, and that visit can save you the price of a cap.

Nothing here is medical advice. Hair loss has many causes: talk to your doctor or a dermatologist before you start a device, and follow the maker's instructions.

Our three picks for this guide

Scores come from our published formula; the full list is in the ranking.