Schwalbe Marathon: GREENGUARD: A highly elastic, India rubber that offers 3mm of puncture protection without sacrificing ride quality. One third of GreenGuard is made up of recycled latex products. VERSITLE TREAD PATTERN: This tread pattern is perfect for city streets, paved bike paths, and hard packed smooth dirt trails. REFECTIVE SIDEWALL: The Reflex sidewall brand is a light-reflecting strip that adds visibility and safety to your riding. ENDURANCE COMPOUND: This compound is used for long tread life and durability. PERFORMANCE LINE WIRE BEAD: The performance line represents our best value in our line up. Excellent quality for extensive use.