Overall Flex

5/10

S15 Ultra Duraflex ST Highback

6 degrees of preloaded forward lean hugs your boot and allows for quick edge to edge response, while the all new molecular highback bushing provides increased freestyle flex and rebound while riding. This unique highback construction is exclusive to Union Binding Company.

Astro Ankle Washer

Union's Astro ankle washer adds another level of confidence and security to your riding. Prevents heelcup slippage on binding models that only feature a single heelcup screw.

Forma X Ankle Straps

Instant response meets all day long foot comfort. The Forma X ankle strap's all-new construction combines our responsive Exoframe exterior with the padded comfort and flexibility of the Forma interior. Form fits perfectly to any boot on the market today.

Magnesium S1 Ratchets

Magnesium S1 ratchets are Union’s answer to the elements. A fully integrated spring protected from the harsh outside provides you with Union’s best ratchet to date. Longer life span and better spring return guaranteed.

TS 5.0 Ultragrip Toe Strap

Multi-Positional options and thermoplastic anti-slip material keep you locked in and on point. The TS 5.0 Ultragrip toe strap is compatible with all boot brands and models.

Molecular Bushing

Union's all-new Molecular bushing provides spring-loaded take offs and perfectly cushioned landings. 15% lighter than Union Fused Vaporite and guaranteed to minimize foot, ankle and knee fatigue. This is the future of freestyle binding design.

TPE Outsole

Exclusive to Union, this 100% new binding manufacturing process requires zero bushing gluing and adds another layer of dampening and vibration canceling material to the all-new Ultra.

Stage 11 ASYM Duraflex ST Baseplate

By removing excess material in the toe and heel of the baseplate, and utilizing a brand new asymmetrical shape, we've been able to drastically increase the torsional flex of the binding. The Ultra's Stage 11 ASYM baseplate allows for 360 degree board flex and feel.