The 2027 Union STR is a comfortable, easy-to-ride binding built for snowboarders looking to progress across the mountain. With a forgiving flex and smooth response, it helps build confidence while maintaining enough support for all-mountain riding. Designed for durability and all-day comfort, the STR is a reliable choice for riders stepping up their skills.
Who are these bindings best for?
Beginner to intermediate riders looking for a forgiving, confidence-building binding that performs well across all terrain. Ideal for riders progressing from first turns to more controlled, all-mountain riding.
| Ability |
Beginner – Intermediate |
| Flex |
5/10 |
| Baseplate |
S5 Duraflex |
| Highback |
S11 Duraflex |
| Ankle Strap |
Exoframe 3.0 |
| Toe Strap |
TS 2.1 UltraGrip |
| Compatibility |
4x2, 4x4, and Channel |
Baseplate
- S5 Duraflex Baseplate – Lightweight and durable construction designed for a smooth, forgiving ride that’s easy to control.
- EXT Thermoformed EVA Bushing – Absorbs vibration and impact to create a more comfortable, forgiving feel.
- Thermoformed EVA Footbed – Cushioned footbed that provides consistent comfort throughout the day.
- Canted Footbeds – Improves natural alignment for better balance and reduced fatigue.
- Camber Disk – Enhances response while maintaining compatibility with 4x2, 4x4, and Channel mounting systems.
Highback
- S11 Duraflex Highback – Medium-soft flex that offers support while remaining easy to maneuver.
- Cam-Lock FLAD – Quick forward lean adjustment for simple, on-the-fly customization.
Ankle Strap
- Exoframe 3.0 – Comfortable and supportive strap that provides a secure fit without feeling restrictive.
Toe Strap
- TS 2.1 UltraGrip – Flexible strap that adapts to different boot shapes for a consistent, secure hold.
Buckles
- Aluminum S2 Ratchets w/ Steel Base – Durable and easy-to-use ratchets designed for smooth entry and exit.
- Quick-Lock + Steel Screw Adjustment – Simple and secure strap adjustment system for a reliable fit.
Flex
- 5/10 – Soft to medium flex that prioritizes comfort and control, making it easier to progress and build confidence.
Additional Features
- Extruded 3D Aluminum Heelcup – Durable construction for long-lasting performance.
- Grade 8.8 Steel Hardware – Reliable hardware built to withstand regular use.
- Progression-Focused Design – Built to help riders develop skills and confidence across all terrain.
Size Chart
| Size |
US Men's |
US Women's |
UK |
EURO |
Mondo (cm) |
| Small |
5.5 – 7.5 |
6.5 – 8.5 |
4.5 – 6.5 |
37 – 40.5 |
23.5 – 25.5 |
| Medium |
8 – 10 |
9 – 11 |
7 – 9 |
41 – 43 |
26 – 28 |
| Large |
10.5 – 13 |
– |
9.5 – 12 |
43.5 – 46 |
28.5 – 31 |
