SKLZ SpeedSac Variable Weight Sprint Trainer Sled Trainer gloves boxing so you can rest assured

so you can rest assured you are buying quality

Dimension: 3 x 3 x 7

so there is no chafing or hot spots

PERFECT FOR MULTI-PLANAR MOVEMENTS

4'' side pulls provide even compression and support

SKLZ SpeedSac Variable Weight Sprint Trainer Sled Trainer gloves boxing so you can rest assuredBuild 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