Designed to hold items firmly in place. Wrap it to the sun visor with the elastic strap then you are good to use it! Made of double-side anti-slip elastic, nylon fabric, and high-strength PE board; Grain textured elastic, effectively prevent sliding for more snugly and stable storage. It holds charger plug, sunglass, charger cord, earphones, cards, driving documents including insurance cards, registration cards and more.