SKLZ SpeedSac Indoor Outdoor Sprint Speed Trainer Weight Drag Bag Pull Sled

Detailed Description : Build explosive leg drive out 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. Practice exploding from a set position, improve your dash time, and increase overall speed. 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. Features : - Includes 3 durable weight bags that can be filled with up to 10 pounds of sand (30 pounds total) - Sled material won't harm grass or mark wood floors - Adjustable leash length to accomodate athletes of any size - Sand not included