Designed to retain stability even on the most challenging terrain, the Mercury Boots are built with terracare nubuck leather and extra-grip Vibram Frog Grip sole.Liquid Rubber reinforcments protect against abrasion and damageBoard lasting Last index: HikingFlex index: A5Weight (UK 8.5): 540g*Sustainably produced in Germany, terracare leather is made with minimal use of water, electricity from renewable energy sources and state-of-the-art production methods.