1Portable pocket designs, place carry-on items, not easy to fall off during sports. 2Fastening hook & loop, repeatedly use without pilling, quality and reliable. 3Precision and fine stitching, make your skin feel more comfortable. 4Neoprene fabric, not easy to pilling, elastic and waterproof, more convenient. 5With adjustable adhesive button, not easy to fall off, can be adjusted according to needs.