Union Source FC The connection between rider and snowboard has never been closer. Union removed the mounting disk, lowered the baseplate, and cut hundreds of grams of excess material to build the Source FC - the lightest snowboard binding Union has ever made, at roughly 1130g per pair with hardware. Italian-made Forged Carbon runs through the highback, heelcup and gas pedal, while the Direct Connect System bolts the baseplate straight to the board with two screws per binding. The result is instant, unfiltered energy transfer and the most direct board feel in the Union lineup. Best for: Advanced to expert all-mountain and freeride riders who want maximum response and minimum weight. Pairs naturally with the Union Reset Pro boot. Overall Flex: 8/10 - Stiff Tech Specs Baseplate: S10 Halo Duraflex XC with Forged Carbon core Highback: S18 Source Forged Carbon Heelcup: Forged Carbon Gas Pedal: Forged Carbon Bushing: Hi-Flex HP EVA FLAD: Integrated 3-Stage Ankle Strap: Phantom Slim Toe Strap: TS 6.0 Phantom Ratchets: Magnesium S1 with aluminum base Strap Adjust: Titanium screws Hardware: Grade 8.8 steel and titanium Connection: Direct Connect System - no disk Canting: None Board Compatibility 4x2 insert pattern via the Direct Connect System. Not compatible with Burton Channel. Warranty Lifetime on baseplate and heelcup 1 year on everything else Size Chart SIZE MEDIUM LARGE MONDO 25 - 28 28.5 - 31 US MEN 8 - 10 10.5 - 13