Made from select hides of triple-ply full grain leather for institutional and professional gym use. Professionally packed with shredded poly fibers and a precision placed center weight for excellent balance and weighting. 3" inside foam liner keeps bags cylindrical and firm through round after round of intense training. Unique seatbelt nylon security hanging straps alleviate tangled chains with increased security. Complete with heavy-duty bottom D-ring to secure to floor, if desired. An incredible heavy bag for beginners to world champions.