Mountain Horse(R) Ladies' Rimfrost Rider III Tall Boot The versatile Mountain Horse(R) Rimfrost Rider III Tall Boot now features the Extensia foot part, which has been tested to withstand one million flexes in 14F weather. Heat-insulating Thermolite(R) lining, covered by a soft foam material, will keep your feet and legs warm while the waterproof construction keeps feet dry up to the start of the zipper. Features: Upper in strong Duralon Strong and durable YKK(R) zipper 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 Breathable, waterproof HYDRO-Tx membrane prevents water from entering into the footpart up to the zipper Removable insole made of cozy and warm pile lining Heel is fitted with shock-absorbing IPS system to reduce shock impact while walking Built-in steel shank for increased stability Stirrup Control System incorporated in the outsole helps maintain correct stirrup position Item Specifications: Color: Black Fabric: Duralon/Extensia Insulation: 200g Thermolite(R)