Muck Boot Hale Multi-Season Women's Rubber Boot Synthetic Rubber sole Shaft measures approximately 13.25" from arch Boot opening measures approximately 13.75" around 4 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 100% waterproof women's boots are suitable for any season and any outdoor activity Lightweight and breathable mesh lining keeps feet well ventilated for long-wearing dryness; comfort rated from subfreezing to 65 F/18 C Women's-specific last is designed to match the contours of women's feet Self-cleaning ribbed outsole offers added stability on slick surfaces; easy on-off style with pull-on tab