PRODUCT FEATURES • Style#XS21WFT01001. • Black and white 2 color ways. • Boa technology offers powerful and no-stretch closure with the twist of a dial. • Boa single-reel system uses a spring-loaded spool to automatically retract cable slack for quick and efficient closure. • Boa-specific Instep Flex Zones function to maintain natural ankle flexion in your boots, whether in or out of your bindings. • Soft flex, good for EU 38 / US WM 7.5 / US MENall mountain and freestyle riding.