The standard-setting benchmark for lightweight backcountry touring performance, the F1 features a responsive, laterallly stiff design and incredible range of motion, as well as an updated liner construction with integrated RECCO technology for added searchability. The Boa Closure System is the most revolutionary closure system on the market. Exceptionally durable and lightweight reels combine with aircraft-grade stainless steel laces to provide smooth, even closure for a secure and truly customized fit. The leader in boot liner technology, Intuition® uses closed cell EVA foam for performance ski and mountaineering boots.