The ETHOS(R) 60 lb. Sand Bag offers a shifting, destabilized load that helps to improve core strength and balance through throwing, passing and catching motions. Maximize Your Workout Adds resistance to a wide range of upper body exercises for increased balance, endurance and mobility Helps to improve core strength by engaging your full body throughout throwing, passing and catching motions Offers a shifting, destabilized load that creates a more dynamic training session Quality Construction Dual-secure closure features a heavy-duty zipper as well as a hook-and-loop system 6 Pull Tough integrated control handles for easy portability and practice Additional Details Includes shell and set of (3) 20 lb. inserts (sand sold separately) Dimensions: 28.5'' L x 6.5'' W x 6.5'' D Click here for additional information relating to the Manufacturer's Warranty.