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SKLZ SpeedSac
Proven to improve your 40-yard dash time and overall speed and explosiveness
Includes 3 durable weight bags that can be filled with up to 10 lbs of sand (30 lbs total); sand not included
Variable weight ranges safely strengthen lower body-muscle groups
Includes instructional DVD and 6-week progressive training workout plan
Get explosive leg drive and stride frequency with the SKLZ® SpeedSac™, a weighted training sled designed for hard-core athletes. The variable weight ranges safely strengthen lower body-muscle groups by providing options for increased resistance training; athletes can remove the bags and use their handles to execute lunge walks for additional hamstring and quadriceps strengthening.