THE ULTIMATE WINTER BOOT. A built-in waterproof and breathable membrane prevents water from entering into the footpart up to the bottom of the zipper, keeping feet dry and comfortable. The heat insulating Thermolite® lining keeps legs toasty. Boots also feature the Mountain Horse patented Stirrup Control System™ with enhanced grip which helps maintain the correct stirrup position as well as increase traction on snow and ice while on the ground. A steel shank for stability and a removable insole. Duralon™ shaft and YKK Vislon® zipper system in back allows for easy entry/exit. Full length Hydro-Tech™ material walls safeguard the zipper from excessive chafing while at the same time provide protection for your saddle. Durable elastic material inserts along calf area for improved individual fitting. Heel part is fitted with the shock-absorbing IPS™ system which reduces shock impact while walking. Fabric: Fabric: Duralon™/Hydrotech™. Lining: Thermolite®.