Features1HIGH SAFETY: Produced with polyurethane polymer, it has super high puncture resistant, effectively protects the inner tube from being punctured by pointed objects 2AUTOMATIC CONTRACTION: The material is soft and will automatically contract with the size of the air pressure, which will not harm the inner tube and prolong its service life. 3STRONG TOUGHNESS AND ELASTICITY: With super toughness and elasticity, it can resist the puncture of glass and other pointed objects and play the role of explosion proof. 4ULTRA LIGHT AND ULTRA THIN: This bike tire puncture proof belt is ultra light and ultra thin, won't increase the burden of riding, keep the comfort of riding, let you enjoy riding more easily. 5APPLICATION: This bike tire puncture proof belt is suitable for mountain biking and road biking, allowing you to enjoy a smooth and safe riding experience in all kinds of road conditions.SpecificationItem Type: Bike Tire Puncture Proof Belt Material: Polyurethane Polymer Composite MaterialPackage List2 x Bike Tire Puncture Proof Belt