Dynafit"s ONE U TF Ski Boots are designed for riders who prefer a progressive flex and support without the weight of Pebax. Made with a PU shell, cuff, and spoiler for undeniable control, and locked down with the Ultra buckle system and central buckle system. Built on a short rockered sole and insulated thermoformable liner that provides a comfortable, instant fitting boot that"s warm and durable. Compatible with Dynafit Quick Step-In bindings and all other standard touring bindings.