Durable polyurethane backstay; 1:1 medium flex PowerUp tongue creates a snug fit between boot and tongue; Women's-specific True Fit provides a more accurate fit for a woman's foot resulting in more control Focus Cuff boosts heel hold and rides slightly higher; Plush Cuff 1.0 features a fur lining for warmth with added neoprene stretch zones to tightly hug your calf; Total Comfort Construction provides an instantly broken-in feel right out of the box Dual-Zone BOA Fit System with Coiler and Lockdown technology features two distinct lace zones that can be independently adjusted with the twist of a dial for a custom fit; Snow-proof internal gusset completely seals the lower zone of the boot Imprint 3 heat-formable liner has a hook-and-loop closure and lace lock along with power panels for a snug, lightweight fit; DRYRIDE Heat Cycle lining keeps feet warmer by capturing body heat and wicking moisture; Sleeping bag reflective foil underfoot improves warmth and comfort ReBounce Cushioning placed within the shell of the boot adds a close layer of impact protection; EST-optimized midsole lowers your center of gravity for better board feel; Vibram Traction Lug outsole with EcoStep rubber uses 30% recycled rubber content and offers more contact points to grip the ground; 1-year warranty The only thing you need to worry about when you're riding in the women's Burton Felix BOA Snowboard Boots is what run to hit next. They're packed with the tech to keep you warm and dry plus a micro-adjustable fit that locks in a secure hold and lets you dial in the feel of the upper and lower to match your feet. And it's all packed into a responsive flex that encourages a relaxed stance and all-terrain versatility.