We designed the new Frontier from the bottom up, using 3D Molded Midsoles and our men’s and women’s lasts for superior comfort. The new lacing system and 3D-Stitched Tongue hold the foot firmly in place, and 200g Thinsulate insulation and a zip-up lace cover will keep your feet warm and dry all day long. The slimmer lighter profile of the Frontier provides a smooth flex up front, while the NNN BC outsole has double steering grooves for controlling your skis on groomed or backcountry terrain.Specs: Lacing Fingers. Lace Covers. Molded Thermoplastic Cuff. 3D-Molded Midsole. 200g Thinsulate Insulation. NNN BC Sole.