The LaCrosse Men's Ursa LS 10" Gunmetal 400G Boots supports fast, confident movement with suede leather and abrasion-resistant nylon upper and breathable GORE-TEX waterproof protection, 400G PrimaLoft insulation. 400G PrimaLoft insulation helps retain warmth for cold-weather hunts and outdoor work without unnecessary bulk. Underfoot, the Vibram Ursa Traction outsole helps maintain traction, and the suede leather and abrasion-resistant nylon upper construction keeps the boot suited to extended movement in cold-weather hunts and outdoor work.