The LaCrosse Men's Alphaburly Aero 17" First Lite Specter 800G Boots supports fast, confident movement with hand-laid ZXT rubber construction and waterproof coverage, Solarcore 800G insulation, moisture-wicking Grid Fleece lining. Solarcore 800G insulation helps retain warmth for cold-weather hunts and outdoor work 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 cold-weather hunts and outdoor work.