Columbia Women's Ice Maiden II Slip Winter Boot 100% Exterior: Leather. Trim: Acrylic (Synthetic Fur) Imported Synthetic sole Shaft measures approximately 8.5" from arch Heel measures approximately 1 inches" Platform measures approximately 1 Boot opening measures approximately 12.25" around CONSTRUCTION: This women's slip boot is constructed of a waterproof seam-sealed membrane. MATERIAL: This women's boot features a combination leather and textile upper, a Techlite lightweight midsole, and our Omni-Grip non-marking traction rubber outsole. HANDY FEATURES: This women's slip boot features a lightweight construction and a faux fur cuff for style. This women's slip boot is the perfect boot for cold winter days. With a waterproof construction, lightweight material, and traction rubber outsole, this women's slip boot will keep you warm and protected against the cold.