The only base layer with adjustable medical-grade knee support that's designed to help you overcome injuries, minimize pain, and get back to activity. Engineered with 90 feet of high-strength cables, adjustment dials and targeted compression, the K1 Summit reinforces the knees, hips, and lower back to keep you active for as long as possible. 

Trusted by 30,000 customers, the K1 Summit offers thermal fabric and is best for skiing, snowboarding or cold weather activity. It's lightweight, machine washable and easily wearable under ski and snowboard pants.