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. Is a great cardiovascular exercise which also increases muscle strength and stamina. Does it burn off calories and keep you fit, but it also helps to nurse and sculpt your upper body. 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. Durable PU material, provide extreme durability and improved functionality, ensures it can withstand multiple beatings time and time again.