The winter riding boot that started it all for Mountain Horse® is warm, easy to fit, and very versatile. THE LEG - Upper in strong Duralon™. Heat insulating Thermolite® lining covered by a soft foam material keeps your legs warm. Super strong and durable YKK® zipper to enhance the life of your boots. Durable elastic material inserts along calf area for improved individual fitting. Full length Hydro-Tech™ material walls safeguard the zipper from excessive chafing while providing protection for your saddle. THE FOOT - Heat insulating Thermolite® lining covered by a soft foam material keeps your feet and toes warm. Breathable, waterproof HYDRO-Tx membrane prevents water from entering into the foot part up to the zipper. Removable insole made of cozy and warm pile lining. THE SOLE SYSTEM - Stirrup Control System™ incorporated in the outsole helps maintain correct stirrup position.Built in steel shank for increased stability. Sturdy and durable YKK® zipper for easy entry and exit. Heel part is fitted with shock-absorbing IPS™ system to reduce shock impact while walking. Fabric: Duralon™/Hydrotech™. Insulation: 200g Thermolite®.