Add some cardio to your workout with the Pure Fun 38-in. Mini Trampoline. Strong and durable, you'll love the added boost to your exercise regime. This trampoline has a frame and heavy duty springs which are constructed out of galvanized steel and features a secure, patented no-weld t-joint system. The galvanized steel is rust resistant, making this mini trampoline perfect indoors or out. The feet are padded to give you extra security, and the thick foam padding has a durable vinyl covering. The polypro jump pad is made in the USA. This mini trampoline is ASTM approved as well as TUV and GS quality and safety certified. The trampoline also includes a limited 90-day warranty.