The Castle X Force 2 Boot - Gray is made for riders who know winter does not wait for perfect conditions. With a 3-Layer Merino Wool blend insulation package, moisture-wicking air mesh, and perforated air trap foam, it helps keep feet comfortable through long rides, fuel stops, and time spent digging out the sled that definitely was not stuck. The integrated Castle DRY-X™ waterproof membrane and weatherproof treated shell help block slush and snow, while the 1000D nylon upper and Armstrong PU coated leather add durability where snowmobile boots take a beating. A Castle Speed Lace system, padded collar, molded toe, and high traction rubber sole give this boot the support and grip you want when northern trails get rough.