The Derby is a stylish performance equestrian boot created on a stirrup-ready last for versatility on the farm. Breathable liner for comfort and versatility, while extra layers of rubber ensure protection during long hours in the barn or stable.- 100% Waterproof, fully lined with 3mm neoprene for flexibility- Hand-laid rubber upper for easy-to-clean durability- 3mm Built-in footbed for underfoot comfort- Steel shank for structural support- Slip-on Chelsea Style- Pull-tabs for easy on and off- Estimated boot height 17cm/ 6.7"- Estimated max circumference 28.5cm/ 11.2"- Outsole designed for optimum use on firmer surfaces- Comfort Range Sub Freezing to 18C