Description Product Description You'll scoff at wintery weather in this high-tech snow boot from Kamik. Constructed with a lightweight, yet durable waterproof nylon shell, the Greenbay 4 features a removable Thinsulate foam liner and a lace-lock snow collar designed to keep warmth in and cold out. Rated to -40° Fahrenheit, the boot has a mid-foot adjustable Velcro closure strap to help keep the foot snug and a thick treaded rubber outsole for traction on slippery, icy surfaces. Amazon.com You'll scoff at wintery weather in this high-tech snow boot from Kamik. Constructed with a lightweight, yet durable waterproof nylon shell, the Greenbay 4 features a removable Thinsulate foam liner and a lace-lock snow collar designed to keep warmth in and cold out. Rated to -40° Fahrenheit, the boot has a mid-foot adjustable Velcro® closure strap to help keep the foot snug and a thick treaded rubber outsole for traction on slippery, icy surfaces. From the Manufacturer Kamik makes footwear that brings to life its northern origins. Singular. Strong. Simply dependable. The result of all this effort: a complete line of outdoor footwear built to deliver superior comfort and reliable protection in the most extreme conditions.