JOMA Men’s Sierra 2521 Grey Trail Running Shoe – FOAM REACTIVE Cushioning & Durable Grip
The improved JOMA Men’s Sierra 2521 Trail Running Shoe delivers high performance on technical and medium-difficulty terrain. Built for runners who want extra cushioning, protection and stability, the Sierra features a wider toe box for enhanced comfort on steep descents and long forest trail sessions.
Key Technologies
- Durability – high-resistance rubber outsole for maximum lifespan
- FOAM REACTIVE – advanced midsole cushioning for softer impact and responsive energy return
- Protection – reinforced toe and side overlays for added safety on rocky terrain
- SPORTECH – seamless thermosealed upper for a secure, lightweight fit
- VTS – breathable mesh ventilation system for improved temperature control
Description
Designed for runners who tackle challenging woodland and technical trails, the JOMA Sierra 2521 combines cushioning, stability and comfort in a lightweight, breathable structure.
The upper is constructed from breathable Jacquard mesh, supported by JOMA’s VTS ventilation system to keep feet cool. A SPORTECH thermosealed support system enhances fit without adding weight.
Toe and side areas feature PROTECTION reinforcements to guard against roots, rocks and debris.
The midsole uses the new FOAM REACTIVE technology, delivering a plush yet stable ride. The forefoot incorporates firmer phylon for control on uneven ground.
The DURABILITY rubber outsole features aggressive grip patterns, ensuring traction, stability and dependable braking even on loose surfaces.
Technical Characteristics
- Upper: VTS engineered breathable mesh with SPORTECH heat-sealed overlays
- Midsole: Phylon with FOAM REACTIVE cushioning
- Outsole: DURABILITY high-traction rubber
- Drop: 7 mm
- Water Resistance: None – designed for breathability
- Intensity of use: Training
- Recommended distance: 20–30 km
- Terrain: Medium–technical trails
- Runner pace: 4:00–5:30 min/km
- Performance level: High
Performance Scale
- Grip: High
- Cushioning: High
- Comfort: High
- Durability: High
- Stability: High
- Responsiveness: Medium-High
Size Guide – JOMA Men’s Footwear
How to Measure
- Heel to Toe: Stand on a sheet of paper and mark the longest point of your foot.
- Measure both feet – choose the size based on the larger foot.
- For trail running, we recommend 0.5–1 EU size up to allow for descents and swelling.
Approximate Size Conversion
| EU | UK | US | Foot Length (cm) |
|---|---|---|---|
| 40 | 6.5 | 7.5 | 25.4 |
| 41 | 7 | 8 | 26.0 |
| 42 | 8 | 9 | 26.7 |
| 43 | 9 | 10 | 27.3 |
| 44 | 9.5 | 10.5 | 28.0 |
| 45 | 10.5 | 11.5 | 28.6 |
| 46 | 11 | 12 | 29.3 |
Sizes vary slightly by model. Contact us if you need personalised sizing help.
Shipping & Click & Collect
- Fast delivery across Ireland & Northern Ireland.
- Click & Collect available at Borderland Muff Outdoor & More, Donegal.
- Need help choosing the right shoe? We’re happy to advise.
Returns & Exchanges
- Footwear can be returned or exchanged if unworn and in original packaging.
- If unsure on sizing, we recommend trying at home on clean flooring.
Why Buy from Borderland Muff?
- Independent Donegal store specialising in outdoor & trail footwear.
- Authorised JOMA retailer with expert product knowledge.
- Trusted by walkers, runners and trail enthusiasts across Inishowen and the Wild Atlantic Way.
Available now from Borderland Muff Outdoor & More – your local supplier of trail running and outdoor footwear in Donegal.
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