Shark CryoGlow Review: Is the Cooling LED Mask Worth It?

Most premium LED masks do one job: they flood your face with red and near-infrared light and leave the rest to your routine. The CryoGlow adds a second system on top. InstaChill (Shark's name for the cooling strips that sit over the eye area) chills the under-eye zone through three temperature levels, and it can run on its own or alongside the lights.

The light side is unusually broad for a single device. You get 480 lights built from 160 tri-wick LEDs, delivering three wavelengths: 630nm red, 415nm blue and 830nm infrared. Four presets remove the guesswork - Better Ageing, Blemish Repair, Skin Sustain and an Under-Eye Revive mode that is cooling only. The presets are dermatologist-developed, so you are not left choosing wavelengths yourself.

It is also a hard shell rather than a flexible silicone sheet. That keeps the surface cool and avoids the clammy feel some cheaper masks develop, at the cost of bulk. At 674g it is a substantial thing to store and wear.

This is the feature that surprises people, and the independent reviews are consistent on it: the cooling depuffs the under-eye area quickly, often within a single session, and morning puffiness reads as less pronounced after a couple of weeks of regular use. It is the closest an at-home device gets to the cold-spoon trick, done properly and hands-free.

Set expectations on what cooling can and cannot do, though. Depuffing is about reducing the appearance of swelling, so it flatters tired eyes on the morning of an event. It does not change pigmentation, so genuine dark circles still show. Reviewers who hoped it would erase shadows came away disappointed; those who wanted a fast de-puff were happy. That distinction is the honest read on the headline feature.

One structural caveat: there are no LEDs directly over the under-eye zone. That area gets cooling only, with the light therapy covering the rest of the face. If your priority is light on the delicate under-eye skin specifically, that is a design limit worth knowing before you buy.

The wavelengths Shark uses sit squarely in the range studied for skin. Photobiomodulation (the umbrella term for using specific light wavelengths on skin and tissue) has a growing but still early evidence base, and 630nm red plus 830nm infrared are the wavelengths most cosmetic LED research reaches for. Published trials on light therapy for skin report modest improvements in the appearance of fine lines and skin tone, and a peer-reviewed study on combined red, blue and near-infrared LED light found measurable effects on skin recovery. The blue 415nm mode targets the surface conditions behind blemish-prone skin.

The honest caveat: most studies are small, short and often industry-linked, and at-home masks deliver lower light doses than a clinic. Treat the light side as a plausible, gradual cosmetic boost that rewards consistency, not a guaranteed result. The CryoGlow's spec is competitive with the best masks on paper - the cooling is what sets it apart, not the light.

For a fuller side-by-side of the flexible masks, see our CurrentBody Skin Series 2 review and our Omnilux Contour Face review, or the full field in our best LED face masks in the UK comparison.