Mephisto Jim GT, Finest durable leather uppers. 100% waterproof GOR-TEX Silicon uppers . Traditional lacing system provides easy on and off access. Soft leather lining ensures an abrasion-free environment for all-day wear. Removable anatomical footbed is fully padded for protection and relief to feet, back, and joints. Long wearing 100% rubber outer-sole absorbs shock and provides great traction.