McDavid True Compression Recovery Long Sleeve Shirt spandex True Compression Recovery Shirt Designed to be worn after strenuous workouts or heavy competition. Increases blood circulation and reduces the amount of lactic acid buildup in the muscles to promote faster and more complete recovery of torn and damaged muscle tissue 87% spandex/13% nylon, 6.5 oz. per square yard Anatomically designed to target large muscle groups and to reduce pressure on knees, shin, and the groin area to allow comfort and movement during recovery