Rosa Customized ConvenienceThe lightest women&';s snowboard binding on the market. Entry-level price tag doesn&';t mean entry-level performance at Union. The 21/22 Union Rosa has been fully redesigned from the ground up. An all-new Stage 8 Duraflex baseplate combined with the Falcor inspired highback delliver the lightest weight and highest value female specific binding the snowboard world has ever seen. Overall Flex: 4/10 Stage 8 Duraflex Baseplate Introducing our lightest baseplate ever. The all-new Stage 8 Duraflex baseplate helps shave over 10 grams off the Rosa&';s total weight. Not to mention, it&';s compatible with all existing mounting patterns right out of the box. Tech Specs Baseplate: NEW Stage 8 Duraflex Bushing: NEW Thermoformed EVA Heelcup: NEW Extruded 3D Aluminum Highback: NEW Stage 12 Rosa Duraflex Ankle Strap: Forma Toe Strap: NEW TS 4.0 Ratchet: Aluminum FLAD: NEW Tool-Less Hardware: Grade 8.8 Steel Strap Adjustment: Traditional Canting: No Disk Cover: NEW Snap Fit THE UNION WARRANTY LIFETIME FOR BASEPLATE / HEELCUP. 2 YEAR FOR EVERYTHING ELSE. Disk Type: Universal Disk - V2 Compatibility : 4X4 4X2 3D 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