Extremely lightweight and flexible, allowing your feet to move naturally. 18mm heels cushion and protect your feet from the road, while a 0mm offset lets your feet have a more natural running position. Breathable mesh uppers. Internal booties keep feet connected to footbeds. HydraMAX collar linings. High-abrasion EVA midsoles. Carbon-rubber XT-900™ outsoles have triangular lugs for superior traction and abrasion protection. Reflective details. Imported. Average weight: .8 lbs./pair. Men's sizes: 8-14 medium width. Half sizes to 12. Colors: White, Black.