PUMA - Alpine Trail Racer Wn's (Metallic Silver/Gunmetal/Sunny Lime) - Women's: Designed with an aggressive low-profile midsole/outsole combination and protectively stylish upper package, the Alpine Trail Racer Wn's is built for the Cross Country and trail racing enthusiast seeking maximum weight reduction, and ground contact and style. Combination upper made of durable nylon and breathable mesh. Full-length CM-EVA and IdCELL cushioning in the heel. Aggressively rugged EverTrack solid rubber.