Add another layer of protection to your bicycle with this Mr. Tuffy Ultra Lite Tire Liner. It is made of durable, lightweight polyurethane and designed for longevity. To use, simply insert this item between the bike tire and tube. This product provides a protective layer that will act as a shield against road hazards. Thorns or glass that may penetrate are blocked by the Mr. Tuffy bicycle tire liner, helping to prevent flats during your cycling adventures. Made of durable, lightweight polyurethane Insert between the bike tire and the tube Provides a protective layer between road hazards and the inner tube Adds another layer of protection to your bike Mr. Tuffy tire liner extends the life of tire tubes Blocks thorns or glass that may penetrate