The Korkers Ice Commuter features 22 ultra durable push-through replaceable carbide spikes for ice-biting and on-demand traction. It is lightweight, minimal and supportive for winter running. The BOA-FIT gives a perfect fit and can be adjusted on the fly when needed. The BOA L6 lacing system wraps from all angles to create a fluid, form-fit. It is designed to work best on low-to-mid volume running shoes. The BOA components are guaranteed for life. Small/Medium fits women's 5.5 - 10 / men's 4.5 - 9 while the Large/XL fits women's 10.5+ / men's 9.5 - 14.