SNOW MONSTER is rated for adventurous pursuits in extreme cold temperatures. Polar ProvenA(R) in some of the world&';s harshest climates, SNOW MONSTER is not only technically superior, but also lightweight and flexible. Recommended during moderate levels of activity, SNOW MONSTER offers everything you need in a performance winter footwear companion. Upper: Tall height, stylish full grain insulated leather upper with nylon locking snow collar to protect from the elements Low-impact and environmentally sustainable B-Tek(TM) Eco materials Seam-sealed for maximum water protection Gaiter clip at vamp for quick and secure attachment of accessory Pull loop at the back for ease of entry Base: Arctic Rubber(TM) shell to provide lightweight flexibility, cold-resistance and resilience EVA midsole for lightweight insulation and cushioning Polar Rubber(TM) outsole for maximized grip and longevity of boot at cold temperatures Icepaw(TM) design pads for improved contact-point grip on ice Insulation: Removable Comfort-Fit multi-layer inner boot system featuring: Thermaplush(TM) soft, next-to-foot wicking layer for warmth Form-fitting B-Tek(TM) Foam lining for comfort B-Tek(TM) Heat lightweight, 4-channel hollow-fibre insulation for high-loft breathability in a broad range of temperatures Vapourized Aluminum Membrane for energy reflection and heat regulation PolyWool polyester wool blend for breathable warmth Hydromax(TM) layering for improved moisture management Diamond Net insulation for wind-resistant protection with a lightweight feel Waffle-comb footbed designed to trap warm air and control odour