MCS is a revolutionary fabric support system traced over key muscle, tendon, and fascia groups to focus greater compression power to wrap precise areas and reduce muscle oscillation and damage. Offers power and protection against muscle trauma during intense activity. Improved muscle alignment for increased power and endurance. Invista Lycra for Certified Gradient Compression. Antibacterial and SPF 50 sun protection. Breathable and lightweight. 80% nylon/20% spandex. Imported.