About this item [Premium Material]: The tire liner is made of high quality PVC material, which is , wear-resistant, lightweight and with strong anti-pressure ability [Function]: The tire liner works as a , which helps to prevent your tire from puncturing by glass, thorns, nails, etc. thus it your inner tube and extend the life of tire [Easy to Install]: Quick and easy to install, just stretch them over your rims and let them stay in place [ of Tyre]: Super light, puncture-proof, explosion-proof; Great cycling accessory for cyclist [Application]: Available in 4 sizes, you can choose based on your needs; Fit for 20/24/26/29 inch or 700C tires; Suitable for rims with a width under 23 mm