Reliable brand quality. Standard with K-Guard protective belt. Technologies: Active Line. The framework of all Active Line tires is the high-quality 50 EPI carcass. Coarse 20 or 24 EPI carcasses are no longer available from Schwalbe. Additionally, the K-Guard provides effective puncture protection for all Active Line tires. Schwalbe's minimum standard for protective belts, proven for many years. The belt is made of natural rubber and reinforced with Kevlar fibers. Together with the 50 EPI carcass, all Active Line tires are well protected against punctures. The versatile quality mixture for all applications. Skin tires have lightweight, thin sidewalls. Advantage: weight savings and reduced rolling resistance. Intended use: City & Trekking.