The R-Stone 28" bicycle inner tube is designed to provide a reliable air seal for urban, trekking, and road bikes, as well as those used on mountain bike paths. Made from high-quality butyl rubber, it offers excellent gas impermeability to keep your tires inflated longer and resists the effects of oxidation and temperature changes. This material also helps with shock absorption, which reduces the risk of pinch flats, often called snake bites, when hitting bumps. It is a practical choice for cyclists who want a dependable tube that handles the varied conditions of daily commuting or long-distance touring.