Union STR Snowboard Binding Comfort, control, and confidence—right out of the box. The Union STR is a durable, mid-flexing all-mountain binding built for riders ready to take their skills to the next level. With all-day comfort and forgiving response, it’s the perfect choice for beginner to intermediate snowboarders looking to explore more of the mountain and level up every run. Reliable performance meets accessible progression. 2% Giveback to Outreach Partners Durable Materials Budget Friendly Lifetime Warranty Baseplate + Heelcup All day comfort and response for riding the entire mountain. The bombproof S5 Duraflex baseplate is built to last. Backed by a lifetime warranty. Flex Rating: 5/10