EASY SET-UP: Black nylon webbing jump surface is attached directly to the tube with an interlaced nylon rope unlike water trampolines which are attached with metal springs. It weighs 70 lbs. Note: Bongo Bouncers are perfect for playing lounging and using as a swim platform but do not provide the same jumping experience as a water trampoline. READY IN MINUTES: Inflates in minutes to keep your Bongo Bouncer in place we recommend an anchor weight of 45-55 pounds attached to the included anchor connector rope (instructions included). DURABLE & PERFECT SIZE FOR 5 KIDS: With a jump surface area of 81 square ft. the Bongo 15-foot is the ideal size for 3 adults or 5 children. Inflated the Bongo 15-Foot is 180 in diameter.