Columbia Men's Switchback 2 Omni-Tech Trail Shoe 100% Mesh and synthetic Rubber sole Omni-Tech waterproof breathable technology Weight: size 9 1/2 pair = 12.45oz/353g Full length Omni-Grip traction with aggressive lug pattern for good traction Full length Techlite midsole for cushioning and lightweight flexibility Synthetic and breathable mesh upper 3D Techlite heel for comfort, support and fit