The hexagonal shape increases stability and allows for maximum jumping space on the high quality polypropylene mat. Rebounding improves circulation, increases the capacity of your heart and lungs, and builds strength and stamina, boosting all round fitness. In just one hour, burn up to 1,200 calories! You can watch TV, listen to your favourite recording or chat on the phone while exercising, enabling you to burn calories and have fun at the same time! Bungee trampolines tend to be quieter, sturdier and more reliable than spring trampolines - making upkeep and maintenance a breeze; guaranteeing that this is a purchase you will enjoy for many years.50" Hexagonal Fitness Mini-Trampoline-T-Shaped Adjustable Hand Rail-Bungee Cord Suspension The trampoline features an adjustable t-shaped bar for extra support as well as rubber tipped legs to protect your floors and maintain traction.