One sections makiwara striking bag-this single sectional striking bag is made of heavy weight canvas with reinforced stitching, filled it with dried beans or shorts,sand,rack or BB all and so on. Hang it on a wall or tree and practice your punching, it will help you to develop your strength and power, most important is to hardening you skin. The measure is 15.5"x15.5". zipper closure makes easy to fill.