Columbia Sportswear Women's Bugaboot Plus Zip Omni-Tech Cold Weather Boot 100% Leather Rubber sole Shaft measures approximately 7.75" from arch Heel measures approximately 1.5" Boot opening measures approximately 11.5" around Dual-compound Omni Grip traction system with an aggressive base pattern matches your environment for sure-footed confidence with every step. Tech-lite midsole is specially formulated to provide impact absorbing support, stability and protection so you can go the distance in comfort. Additional underfoot insulation for more warmth and prevention of heat loss Omni Heat reflective technology reflects your own heat back at your body for 20% more warmth without bulky insulation. Full length, lightweight and flexible tech-lite outer shell is covered with waterproof leather for protection from the elements.