Fast in. Fast out. Locked in for total control. The Union Astra Step On (R) brings the proven convenience of Step On (R) technology to women 's all-mountain performance. Featuring the Step On (R) Instant Connection (TM) System, the Astra delivers lightning-fast entry and exit without sacrificing response, precision, or power. Union Binding Company is the only licensing partner developing and producing its own products, which feature the Step On (R) Instant Connection (TM) System. Union Astra Step On Snowboard Bindings Womens | White | Medium | Christy Sports