The Challenger 7 GTX features:
- Extended heel pull
- Engineered mesh
- GORE-TEX Invisible Fit with 70% recycled polyester face fabric
- Compression molded EVA foam midsole
- Durabrasion rubber outsole
- 4mm lugs
- Laces with 70% recycled nylon and 30% recycled polyester (excluding aglet)
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