There's a treatment that repairs muscles and stimulates collagen growth all at once. The only caveat: it's really, really cold. But that doesn't stop countless clients—professional sports stars among them—from signing up for it again and again. The treatment is cryotherapy, and it's the specialty at iCryo. Here, clients immerse themselves in chambers set to temperatures around -250 degrees for short bursts at a time, and the extreme cold rejuvenates the skin and body in myriad ways. Clients can also opt for local cryotherapy, which zeroes in on specific areas such as the face to tackle everything from age spots to acne to migraines and sinus headaches.