Silver Winner In The Category Trailrunning
The SIDAS T-FREE TRAIL is a technical running sock recognised with the European Outdoor Award in the trail running category. Developed in collaboration with world-class athlete Jonathan Albon, it is built on a unique concept: only the big toe is separated from the rest of the foot, optimising biomechanics while running.
At its core is the T-Free® technology, which gives the big toe free, independent movement and improves push-off, stability and a natural running style. Instead of separating all toes as in traditional toe socks, only the big toe is separated. This makes the sock easier to put on and provides optimal cushioning.
What convinced the jury:
★ T-Free®: freedom for the big toe:
The free, independent movement of the big toe noticeably improves push-off and stability on technical terrain.
★ Anatomical left/right construction:
In & Out technology with no cut threads inside and an anatomical fit create a second-skin feel and help reduce blistering.
★ Athlete-validated and race-proven:
Developed and tested with Jonathan Albon; used on the podium in 2025 at events including Ultra-Trail Australia and Western States Endurance Run.
Jury Statement:
We liked how the T-Free Trail sock translates biomechanical research into a highly functional product for trail running. By allowing the big toe to move freely, the design provides a simple yet effective way to improve stability, comfort and propulsion when it matters, especially on technical trails.
Product Scoring:
Thoughtful material selection and technical details
In terms of innovation, the T-Free Trail sock achieves an innovation score of 74 percent, mainly due to its research-based design approach.
The jury recognised the biomechanical approach, which could improve performance on uneven terrain in trail running in particular. It also praised the strongly athlete-focused development process, combining practical performance insights with thoughtful material selection and technical details for demanding running conditions.
Product Specifications:
- Weight: 15 g
- Sizes: 35–36, 37–38, 39–40, 40–41, 42–43, 44–46, 47–49 (7 sizes)
- Colours: Black & Grey, Navy & Grey, Grey & Orange
- RRP: €29.95
- Materials: 96% multifilament polyamide, 2% elastane, 1% silicone, 1% reflective yarn
SidasSidasSidasDesign & Materials
Design: Technical trail sock profile with separated big toe and zoned protection and ventilation areas.
Materials: 96% multifilament polyamide, 2% elastane, 1% silicone, 1% reflective yarn; Polygiene® treatment.
Handling: Grip band around the ankle for hold in the shoe; reflective strip on the cuff for visibility in low-light conditions.
Further features: Breathable mesh, protective padding zones at ankle and toes.
Intended Use
Target group: Performance-oriented trail runners looking for natural biomechanics, improved push-off and comfort on technical terrain, from recreational to elite athletes.
Use cases: Trail running, ultra distances, technical terrain; especially suitable for uneven off-road routes.
