Pro Impact Genuine Leather Speedbag Black &ndash; Heavy Duty Leather Hanging Swivel Punch Ball for Boxing MMA Muay Thai Fitness or Fighting Sport Training DURABLE LEATHER MATERIAL. To provide extreme durability and improved functionality, the Pro Impact Genuine Leather Speedbag is made using 100% top-grade genuine leather to ensure it can withstand multiple beatings time and time again. HIGH-QUALITY CONSTRUCTION. A heavy-duty latex bladder prevents loss of air even after being repeatedly punched. Additionally, triple reinforced seams are welted to increase the bags integrity while making sure it doesnt affect the direction of the bag if you strike it. GREAT EXERCISE ACTIVITY. Practicing with this Leather Speedbag is a great cardiovascular exercise which also increases muscle strength and stamina. Not only does it burn off calories and keep you fit, but it also helps to tone and sculpt your upper body. PEAR-SHAPED SPEEDBAG. Designed for rapid recoiling, this speedbag can help to develop your reflexes, increase your speed and improve your hand-eye coordination. The pear shape provides easy targeting, allowing you to get accurate punches and good rebounds without messing up your rhythm. CHOICE OF SIZE. To accommodate beginner, intermediate and advanced users, the bag is available in an extra small 5"x7" size, small bag measuring 6"x9" and medium 7"x10" size. Each one is designed to rebound quickly, helping you build up your hand speed, rhythm and eye contact.