Columbia Sportswear Women's Snowtrek XTM Snow Boot 100% Leather-and-synthetic Rubber sole Shaft measures approximately 8.5" from arch Heel measures approximately 2" Platform measures approximately 1" Boot opening measures approximately 11.5" around Lightweight, low-bulk 600g insulation Tricot lining wicks moisture and dries quickly Lightweight, durable TechLite midsole provides shock absorption, support, stability and protection, and resists compression set Tongue and heel loops for easy on-off Dual-density Omni-Grip rubber outsole with winter-specific tread pattern