Technical Specifications Specifications
WARNING: Cancer & reproductive harm. For more information click here.
- TPU Insert: Ergonomic TPU insert for support and anti-torsion control
- Midsole: Injected PU midsole for stability and energy return
- Outsole: Vibram outsole with XS Trek rubber compound for superior traction
- Tread Design:
Sizing
SRPA Euro US Sizing Chart
All SRPA non-plastic footwear and our Alien 3.0 uses European sizing.
- 1 Euro whole size = 6.6 mm = 0.26 inches
- 1 US whole size = 8.4 mm = 0.33 inches
- The 30 Euro sizes below cover the same size range as 24 US sizes
- Euro sizes provide a better more precise fit for your intended use
- For mountaineering boots upsize (1/2+ sizes) depending on desired fit.
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