Muck Pacy ll Rubber All-Season Women's Riding Boots Rubber Synthetic sole Shaft measures approximately 15" from arch Heel measures approximately 1.25" Platform measures approximately 0.5" Boot opening measures approximately 14.25" around 5 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to the shape of little feet to resist blisters and chafing Boot opening allows for riding pants or jeans to be tucked in; fleece lining provides superior comfort but is durable enough for long, cold treks; comfort rated from -20 F to 50 F (-30C to 10 C) etc sock liner reduces friction and heat build up; women's-specific last is designed to follow the contours of the female foot Narrow toe and slim tread with horizontal pattern provides easy stirrup access and grip; Achilles reinforcement for additional support and long wear; heel spur for riding High-grade rubber provides extra toughness and makes for a 100% waterproof riding boot; easy on-off with pull-on tab