Muck Boot Arctic Sport Ll Extreme Conditions Tall Rubber Women's Winter Boot Synthetic Rubber sole Shaft measures approximately 16" from arch Heel measures approximately 0.75" Platform measures approximately 0.5 inches Boot opening measures approximately 16" around 5 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to the contours of your foot to resist blisters and chafing High-grade extended rubber exterior provides extra toughness and makes for a 100% waterproof winter boot; pull tab for easy on/off Fleece lining is soft for enhanced comfort, durable for long wear, and provides exceptional warmth in frigid environments; comfort rated from -40 F to 40 F (-40C to 4C) Womens last is specially designed to support the female foot; 16-inch height offers maximum protection from the elements Comfort insole supports and cushions feet; slip-resistant, rugged outsole offers durability and traction on slick surfaces