Union Strata Snowboard Bindings - 20/21: The Strata has quickly become one of Union's most popular freestyle binding models and the reason is clear-- Dialed Dampening. Layers of Thermoformed EVA, Duraflex ST Nylon and Fused Vaporlite combine to provide the most vibration canceling ride you've ever experienced. Cruise the park, surf through pow or mash over chunder, the Strata will keep your knees and feet happy all season long.