Invincible Leather Heavybagsare the bags everyone needs in their arsenal. Buy them Unfilled/Empty. Heavybag that is pure punching pleasure. Kick it, punch it take out your aggression or train for the upcoming fight, it will always ask for more. This bag is durable, solid, and will not lose shape no matter what you dish out. Triple Stitched with Rivets for durability. Four buckles on top and one buckle on bottom to additional securing to the ground.Perfect heavy bag for boxing, MMA, Muay Thai, aerobic workouts or any contact sport. Designed for a full 360 degree maneuverability around the body for strikes, punches, kicks and throws, build strength, tone and condition your body with a muscle building aerobic workout. Can be used for ground and pound.