AHATECH Sports Elastic Knee Kneecap Pressurized Movement Swimming Jumping Breatheable Kneelet - Black Perfect for most sports activities like jogging, running, cross training, hiking, mountain biking, gym, horse riding Ergonomic shaped padding to protect the knee from impact and scrapes Slim and compact design. Lightweight, portable, breathable fabric, easy to wear. Thigh circumference 34cm, calf circumference 28cm, length 26cm.