1Contains 20 magnets to protect the waist, front and back two pcs of functional cloth acting on the waist. 2Hook and loop design, can paste it repeatedly. Can be adjusted according to your own requirements. 3Great fabrics, feel delicate, soft and elastic. 4Offer support to your spine and waist muscle to protect you from hurt while doing exercise. 5This is a great waistband to care your waist, relieve fatigue.