Rebounder -Described as "the most effective and efficient form of exercise yet devised by man" NASA. This is an entire body, low impact exercise for the whole family, fun, convenient and therapeutic.The frame has a lifetime warranty, the mat 5 years and the spring 1 year. All parts are replaceable. This rebounder folds in half and comes with a carry bag for transport. The Rebounder is 40 inch in diameter and 9 inch off the ground.It is the best in quality rebounder that has been produced with a soft bounce and absorbs over 80% of the shocks to the joints.