La Sportiva Men's Mix Grey/Petrol Sneaker 42.5 (US Men's 9.5) D - Medium Leather Imported Synthetic sole An extremely comfortable approach shoe designed for many hours of wear Upper: Leather/ Microfiber; Lining: Synthetic (back half and tongue only) Midsole: Dual Density Compression Molded MEMlex; Sole: FriXion&reg; XF with Impact Brake System at the heel and climbing zone at the toe Last: Comfort Tech; Construction: Board Lasted Weight: 10.3 oz / 292 g