Here is a durable sled that lets you push your body and burn more calories while exercising outside. The Xtreme Monkey Professional Driving Sled has a fully welded construction with zero bolts on the frame. It comes with replaceable nylon feet. The frame weighs 80lb and has two solid steel push posts.
The sled measures 46″L x 32″W . The removable posts allow you to change direction without having to turn the sled. Costs around $350 at this time.