WHY USE THE POWER BAG? Develops strength into quickness and agility. Develops hand gripping strength. Tones and defines all muscle groups. Good warm-up before going live. Provides excellent ``cool down`` workout. Allows wrestlers to workout alone. CONTENTS: Cover: 18 oz. vinyl coated nylon Filler: Silica sand Color: Red Grip: Sewn in rubber handles REQUIRES additional shipping because of weight. We will call you with a shipping quote prior to shipping! Special ship charges apply.