One of the warmest plastic mountaineering boots made, the Koflach Arctis Expe Boots are compatible with Randonee ski bindings and nearly every kind of crampon and snowshoe. Rated to -50°F. Recommended for serious expeditions, technical ice climbing, and general mountaineering.

• Dual-density polyurethane "Y" technology; soft plastic uppers retain their supple flex even in sub-zero temperatures, while the lowers utilizes a stiffer plastic to ensure a steady platform
• Shell features a rigid shank, a slight rocker for walking comfort, and has prominent "step-in" grooves for binding compatibility
• A layer of synthetic cork is used in the shell's sole for additional insulation and shock absorbency; EVA heel plug further helps to dissipate shock
• Special Vibram winter climbing configuration for improved performance in snow
• Recessed heel pocket in bottom of shell interlocks with the inner boot's heel to prevent any play between the two components
• Fully lace-removable inner boot made from both open- and closed-cell foam to maximize insulation while blocking out moisture; accommodates all foot volumes and shapes
• Inner boot features thermo-formable heel and ankle padding (adapted from Atomic's alpine ski boots) to allow for a better performance fit, reduced heel lift, and increased comfort
• Inner boot can be worn inside a sleeping bag in expedition conditions; men's sizing: consult chart to translate for women
• Note: These boots are UK sized and shipped according to their UK size. Please use the size chart to find your appropriate UK size