Multifunctional self-priming sit-ups with suction cup abdominal sit-ups, portable abdominal core strength muscle training and body stretching health-care abdominal fitness device, suitable for home fitness or business trips specification: Name: Sit Bar Fitness Auxiliary Equipment Material: foam + stainless steel tube + rubber Features: fitness equipment, portable, suction cup, weight loss Yoga mat size: 183X60X0.9Cm feature: Small size, no space, light weight, easy to store. Thick and soft foam, soft and comfortable, will not hurt your feet. Suck strongly and refuse to loosen. Comes with a yoga mat, a yoga strap set, you can freely combine accessories, and there are many ways to use it.