Premium full-grain leather from an LWG Silver-rated tannery provides comfort and durability. Waterproof membrane keeps feet dry and comfortable for protection in any weather. Side zip for convenience. Rustproof hardware for durability and an authentic Timberland look. 100 percent recycled PET laces. 100 percent recycled PET lining is comfortable, breathable and environmentally conscious. Cushioned EVA footbed provides underfoot support and disperses shock. EVA midsole for all-day cushioning and shock absorption. Durable rubber lug outsole (15 percent recycled rubber) for traction. Circumference 36 cm / 14 3/16 inch.