The three-layer waterproof strip has good overall performance. It is composed of a variety of materials, and each layer cooperates with each other to give full play to their respective advantages and achieve excellent overall performance. Special materials and structural design are used to effectively reduce air penetration and resistance, reduce air convection, and improve the body's thermal insulation performance. Three-proof waterproof strip is an efficient and reliable sealing material with wide application prospects. It is suitable for sealing and isolating gaps in various shoes and clothing, and can effectively improve the insulation and waterproofing effects of shoes and clothing.