The LaCrosse Men's Alphaburly Aero 17" Major Brown 2000G Boots delivers a balanced mix of mobility, protection, and traction through its hand-laid ZXT rubber construction construction and waterproof coverage, Solarcore 2000G insulation, moisture-wicking Grid Fleece lining. Solarcore 2000G insulation helps retain warmth for deep-winter and very cold conditions without unnecessary bulk. Underfoot, the Burly Trak outsole helps maintain traction, and the hand-laid ZXT rubber construction construction keeps the boot suited to extended movement in deep-winter and very cold conditions.