FR LYT Toe - 15% lighter, but still ensures perfect ski boot centering and consistent release values; Automatic toe height adjustment to adult alpine ski boots (ISO 5355 TYPE A) and adult Walk ski boots (ISO 23223 TYPE A); SX FR Heel; GripWalk - Accommodates all Alpine ski boots (ISO 5355 Type A) plus all GripWalk ski boots (ISO 23223 Type A); Compact design; This model is ideal for all-mountain skiers who prefer control, performance and easy handling