1Elastic designs on the back, can adjust the size as you like, simple and convenient. 2Neoprene fabric, not easy to pilling, fine stitching, elastic and waterproof. 3Good splicing, precision line, let your skin feel more comfortable after wearing. 4Stable hook & loop, adjustable adhesive button, can be pasted at will, not easy to fall off. 5Safe and breathable, care your waist during exercise. Breathable mesh surface.