The Fierce GTX BOA® Boot is the ultimate footwear for women trailriders seeking the best warmthpossible while maintaining walking comfort and durability. The custom-developed Michelin® insole is designed specifically for added traction on icy surfaces, while the BOA® lacing system provides uniform closure force for support and comfort while walking. With 1000g of 3M™ Thinsulate™ insulation and an insulated aerogel insole, plus waterproof GORE-TEX construction, the Fierce GTX BOA® Boot provides superior warmth for the coldest days on the trail.