Muck Boot Women's Arctic Ice Mid Waterproof Winter Boots - Designed for some of the coldest conditions, perfect for trekking in the back woods but also just enjoying the great outdoors. 100% waterproof EVA footbed bioDEWIX footbed insert topcover with NZYM for odor control and moisture management Vibram Arctic Grip A.T. for wet ice traction coupled with XS Trek Evo adding durability and improved grip on wet and dry surfaces Soft, insulating, lightweight, performance Weight: size 8, 2lbs Calf circumference: 15in Temp range: -40°F / 40°F (-40°C / 4°C) Style: ASVMA-100