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Ships within 48 hours · Estimated delivery Aug 27 - Sep 1
Available size: Youth
and vertical jump
Built to last and easily portable
Move resistance cables on belt to target specific muscles
One button
SKLZ SpeedSac Variable Weight Sprint Trainer Sled Trainer shop - all Available size: YouthBuild explosive leg drive and speed right of the blocks with the SpeedSac. This variable weight sled allows you to strengthen your lower body muscles by resistance training similar to metal sleds. With removable weights, the SpeedSac allows you to adjust the towing resistance. You can also use the handles on the bags to perform various upper and lower body exercises such as lunges or front raises. Note: Only use on grass, turf or wood surface. Use on
