After almost 3 years of relentless research and development in the tireless pursuit of perfection, the Uppercut Bag has been engineered to address the long-standing challenges that have plagued traditional boxing bags for decades. Sagging, inconsistent rebounds and durability are fears of the past. Made from a custom-developed 1/8" microfiber that uses a polyurethane substrate to form a three-dimensional mesh structure, our bags will outlast any leather or PVC boxing bag on the market. 6 reinforced straps and steel rivets secure the body of the bag to heavy-duty steel buckles to ensure longevity. Custom developed 3/8" impact foam sits behind the microfiber and is then machine filled with blended fabric to ensure a dynamic interaction of rebound and resistance. Custom developed microfiber 100lb machine filled 3/8" impact foam 6 panel design Triple stitched reinforcements 6 reinforced straps and buckles Reflective piping Ventilated panelling Chains included 28" long 24" wide 1-year warranty