Directional tread with smooth center section and micro-knurled shoulders for a quiet running tire with low rolling resistance perfect for road and trekking use Directional tread with smooth center section and micro-knurled shoulders for a quiet running tire with low rolling resistance perfect for road and trekking use Green compound is made from renewable and recycled raw materials Twin Skin - An additional rubber coating on the side protects against cuts and allows for uniform coloring KGRD - Layer from natural rubber, reinforced with KevlarÌÎÌ_ÌÎ_ÌÎÌ__ÌÎÌ_Ì´åÇÌÎå«ÌÎÌÊÌÎÌ_ÌÎ_ÌÎÌ__ÌÎÌ_ÌÎ_ÌÎÌ__ fibres. The protection standard for every tire from the Active Line