http://www.nantongsporting.com/vaulting-box/ Name4 In 1 PVC Plyobox Foam Box MaterialEPE+PVC coated fabric FunctionBody building Coloroptional PackWooden Box or Carton Comfortable foam protects your joints and tibia: Filled with 60 pounds (about 27.2 inches) of heavy-duty high-density re-bonded foam, soft but flexible, reducing the impact on joints and the risk of tibia injuries. The jumping box is stable enough, with a load-bearing capacity of 400 pounds. The PVC surface is waterproof and sweatproof, and it can be easily cleaned by simply wiping the footprints and dirt. The durable metal zipper can remove the layers. To facilitate wrapping, please do not tear off the black film covered by the foam. Our jumping box is the best exercise tool for improving leg strength! Enhanced training allows the muscles to exert their maximum strength in a short time. In addition, by constantly jumping, your balance and stability will be greatly improved. There are 3 heights in 1 box, more possibilities, no need to assemble; choose the level you want to play your muscle potential in a short time. Home gym plank training: Jumping Jumping is a powerful aerobic exercise that makes you faster, stronger and more resilient than ever. Now you only need a box to burn calories and build lower body muscles! You can also use the box for push-ups, bows and dipping sauces.China Vaulting Box manufacturers website:http://www.nantongsporting.com/vaulting-box/