Train your way to explosive leg power with the SKLZ® SpeedSac™ variable-weight sprint trainer. This customizable weight sled allows you to safely and conveniently strengthen lower-body muscle groups indoors or outdoors. The removable sand bags can also be used for a variety of upper-body exercises.
Get your new SKLZ® SpeedSac™ today from Sports Authority.
1 SpeedSac™ bag with inner clip to secure sand bags
3 sand bags can hold up to 10 pounds each
Handles on sand bags allow for upper-body exercises
Won't harm grass or mar wood floors
Instructional DVD and 6-week progressive training workout plan