Brooks Running Shoes. The ultimate in motion control shoes available to runners. Designed explicitly with the severe over pronator or larger runner in mind. Upper: Synthetic leather & nubuck upper. Lightweight breathable mesh. Posterior Metatarsal Strap. Internal Support Sleeve. Asymmetric heel stabilizer. Ultimate Sockliner with long lasting IMPLUS foam. Thermoplastic heel counter. Midsole/Outsole: Compression molded EVA. MC-Pod Technology. HydroFlow ST, and Forefoot HydroFlow for cushioning. Extended Diagonal Rollbar. Durable carbon rubber outsole. Weight: 10.6 oz.(300g)