85% Nylon, 15% Spandex The graduated compression structure may help increase circulation Provides firm support, and could aid in pain relief in the lower leg The snug fit holds the sleeve in place so it won&';t slip, avoiding skin irritations Fabric is breathable and flexible allowing free movement of your calves May assist in quicker recovery after an extensive workout Could reduce inflammation in the calf and ankle caused by standing, traveling, arthritis, and other medical conditions