The SEYOUN 22 is a bicycle inner tube crafted from natural rubber, designed to provide a reliable air seal for standard, city, or folding bikes. Its reinforced structure and high material density help the tube withstand mechanical shocks and high compression, which ensures a more durable ride across various urban terrains. To help you maintain the correct tire shape for stable rolling, this model features an optimized design that promotes uniform inflation. This technical approach is highlighted by a green-red graphic on the packaging, guiding you toward a setup that prevents deformation and minimizes air loss during your daily commutes.