Stage IV Duraflex ST Baseplate – A stiff base combined with dual density injected bushings, provides high performance response, comfortable dampening and a true board flex. Completely indestructible.

Thermoformed EVA Bushings – Union Thermoformed EVA Bushings are super lightweight, dampen vibrations, and promote a true and even board flex.

Universal Disks – Compatible with 4x4, 4x2 and Channel systems.

Force Highback – Flex and tweakability where you want it, support and durability where you need it. These highbacks give you next level heelside response and board control.

ExoFrame Straps – Independent suspension and support create a seamless interface. This all new super cushioned and lightweight design comfortably holds you in, but won't hold you back.

UltraGrip X – All new for 16/17, UltraGrip X is the evolution of Union's thermoplastic anti-slip toe straps. Lighter, grippier, and even more comfortable.

Magnesium 2.0 Buckles – Four times stronger than aluminum with only half the weight, Union buckles are built to last. The all new 2.0 design is 10% lighter than previous versions.

Extruded 3D Aluminum Heelcup – Made of extremely durable extruded aluminium, designed to minimize toe drag while optimizing heel hold.

Grade 8.8 Hardware – The most commonly used hardware is made from "mild steel" that has a property class of only 4.6. Considering how much stress a binding is under, Union uses only the strongest steel on ALL hardware.

Tool-Free Adjustments – No screwdrivers needed - Flip the levers for a quick and easy on-hill adjustment.

Union offers a lifetime warranty on baseplates and heelcups. If you break, or even crack your baseplate or heelcup during riding, they'll replace it for life. Guaranteed. All other parts are covered for 1 year from date of purchase.