Norfin Klondike 2 Boots Grey 9. Thanks to the thick and warm insole and EVA (foam rubber) material these boots can be comfortably used at temperatures as low as -40 F. The boots weigh 30-40 percent less than their rubber or PVC counterparts. Specifications for Norfin Klondike 2 Boots - Men's: Manufacturer: Norfin Gender: Male Footwear Type: Winter Boots Fabric/Material: EVA Features of Norfin Klondike 2 Boots High quality boots comprised of extremely light durable EVA material Durable solid rubber outsole features two retractable stainless steel ice cleats for added safety and protection Inner Thinsulate layer provides thermal insulation and moisture wicking capabilities Heat reflective foil deflects cold and keeps body heat External polyester layer provides premium insulation and wicks moisture from the insole Package Contents: Norfin Klondike 2 Boots Norfin 16990-42: Klondike 2 Boots Grey