PP Material:PP (polypropylene) is a thermoplastic resin with high tensile strength. It is mainly used in aviation products and high-end luggage. It has the characteristics of lightness and softness, strong flexibility, and is not easy to deform. It can prevent stepping, falling, explosion-proof, waterproof, collision It can rebound immediately afterward to protect the luggage. Lightweight and durable. So you can go anywhere with ease and confidence.