Force Workhorse DependabilityThe most trusted binding in snowboarding. The latest generation of the Union Force provides a smooth yet responsive ride feel that&&';;s great for any rider, any condition, and any terrain. There&';s a reason that more snowboarders around the globe choose to ride the Union Force than any other binding on the market today. Ride like the best - ride the Union Force. Overall Flex: 7/10 Stage 4 Duraflex ST Baseplate: Quick edge-to-edge power and a locked in ride feel. The Stage 4 Duraflex ST baseplate is Union&';s go-to for anything and everything you can throw at it - cliffs, powder, side hits, double blacks... This all-mountain destroyer can handle it all. Disk Type: Camber Disk Compatibility : 4X4 4X2 Channel Size Chart MEN SMALL MEDIUM LARGE MONDO 24 - 25.5 26 - 28 28.5+ UK 5 - 6.5 7 - 9 9.5+ US MEN 6 - 7.5 8 - 10 10.5+ EURO 38 - 40.5 41 - 43 43.5+ WOMEN SMALL MEDIUM LARGE MONDO 21 - 23.5 24 - 25.5 26 - 28 UK 2 - 4.5 5 - 6.5 7 - 9 US WOMEN 4 - 6.5 7 - 8.5 9 - 11 EURO 34 - 37 38 - 40.5 41 - 43 YOUTH EXTRA SMALL SMALL MEDIUM MONDO 17.5 - 21 21 - 23.5 24 - 25.5 UK 10K - 2 2 - 4.5 5 - 6.5 US YOUTH 11C - 3 3 - 5.5 6 - 7.5 EURO 28 - 34 34 - 37 38 - 40.5