Crispi Men's Lapponia HTG Hiking Boot 100% Leather Imported Vibram sole Upper: Water repellent nubuck leather Gore-Tex Insulated Comfort Footwear Lining Outsole is a Vibram sole with polyurethane shock absorbing midsole and our exclusive CRISP Crossbow Frame insert. Super Grip Technology. Made exclusively for CRISPI Crispi Ankle Bone Support System (ABSS) protects the entire ankle area offering outstanding sprain protection even on the roughest terrain and limits fatigue on the lower joints CRISPI Air Mesh Felt Active Carbon insole offers outstanding breathability and anti-perspiration/anti-odor control.