• Waterproof construction includes uppers made of polyurethane-coated leather, synthetic leather and abrasion-resistant recycled polyester mesh
• Recycled rubber randing protects uppers and enhances durability for lasting use
• PrimaLoft® Eco insulation uses a minimum of 50% recycled materials to ensure warmth and comfort during active use
• Polartec® 200 polyester linings provide excellent moisture wicking and help control temperature
• Contoured insoles enhance support and comfort with 20% recycled EVA composition; insoles also mold to the shape of your feet for enhanced support
• Multicomponent midsoles feature heat-reflection foil laminated between 2 layers of polyester to enhance warmth; compression molded EVA midsoles use 20% recycled content
• Cushioning inserts directly under the heels soak up and dissipate impact shocks; thermoplastic urethane arch shanks provide midfoot stability on uneven terrain
• Vibram® rubber outsoles on the Patagonia Das Boot Waterproof Mid winter boots are designed to supply excellent traction in winter conditions

Temperature ratings are approximate based on high activity levels and can be affected by many conditions, including weather, wearer's activity level, fitness, metabolism, perspiration, circulation, exposure time, clothing and cold sensitivity. Average weight specification is per pair, based on size 9.