Feel the more supportive midfoot fit of the updated Hoka One One Challenger ATR 2 running shoes. You'll experience increased comfort across the top of your feet for more efficient and confident running on the road or trails. Just like their predecessor, this version provides versatility and incredible stability.Upper: Closed air mesh provides added protection on the trail with access to breathability. Seamless no-sew midfoot support. Padded tongue and heel collar enhance comfort. Flat laces reduce irritation.Midsole: Full EVA midsole provides signature HOKA cushioning. Early-Stage Meta-Rocker midsole is designed to encourage a smoother ride, and a faster transition to the forefoot. Ortholite® insole. Outsole: Podular outsole design provides stability on uneven terrain. 4mm lugs provide all-terrain traction.