Flexsports Lifting Power Straps are used primarily in weight training. Lifting Power Straps give added grip for pulling exercises; consequently, this helps isolate the specific muscles in the back, shoulders, chest and arms for stronger workouts.Lifting Power Straps by Flexsports are made with the highest quality webbing, combining cotton with polyester filler. Flexsports Lifting Power Straps offer a natural cotton fiber to ensure maximum comfort and grip. The poly-core gives the 1½" width webbing strength and durability.To apply: simply insert strap through small hole, put hand through loop created and close loop until snug around wrist. Be sure strap end is directed between the thumb and index finger. Use thumb and a "twisting motion" of the hand to wrap tightly around the bar in opposing circular direction of the hand. Repeat steps for other hand.