INSULATION: 3-Layer Merino Wool blend insulation with moisture wicking air mesh & perforated air trap foam. Castle ColdShield® Technology: Removable insole engineered from a moisture wicking wool blend with a metallic heat reflecting layer
WATERPROOFING: Fully integrated Castle DRY-X® waterproof membrane. Weatherproof treated shell materials include 1000D nylon upper with Armstrong PU coated leather

• The Atop® System adjusts fit with precision and allows for quick release
• Atop® laces are lightweight, strong, and expertly configured for comfort and performance
• Atop® low-friction guides ensure a smooth closure, every time
• Reflective elements
• Molded high abrasion toe
• Durable high traction rubber sole
• EVA footbed offers all day comfort and thermal enhancement from the cold