Lightweight. Softshell Upper. Waterproof and Breathable Membrane. Gusseted Tongue. Protective and Durable All-round Mudguard. Ankle Supportive Cushioned Collar and Tongue. Arch Stabilising and Supportive Steel Shank. Cushioned Footbed. Upper: Textile/PU, Lining: Textile, Outsole: Vibram - Moulded EVA/Phylon Rubber. The Renton walking boots are lightweight, waterproof, and breathable. They are durable thanks to the innovative all-round mudguard. They feature a gusseted tongue, ankle supportive cushioned collar and tongue, arch stabilising steel shank, and a cushioned footbed.