DISCONTINUED-Stay warm this winter with Mountain Horse's Ice Rider Tall Boots! The sleek and elegant features of the Ice Collection offer the same dry/warm protection as the original Rimfrost boots. Duralon shaft with heat-insulating Thermolite lining to keep legs and feet warm. YKK Vislon zipper has elastic for an individual fit. Breathable waterproof HYDRO-Tx membrane prevents water from entering into the foot-part up to the zipper. Ergonomically designed removable insole with shock absorbing PORON pads together with soft Nylex offers excellent comfort throughout the day. Stirrup Control System incorporated in the outsole with enhanced grip which helps you maintain the correct stirrup position as well as increase traction on snow and ice while on the ground. A steel shank for stability. Heel fitted with shock-absorbing IPS system. Fabric: Duralon®/Hydrotech. Lining: Thermolite.