Please click for the La Sportiva Size Conversion. The La Sportiva Jackal trail running shoes are ideal for long-distance trail runners who want superior cushioning and a wider fit that will allow them to conquer any outdoor adventures! Tempo Ultra last. Trail running shoe made of a breathable mono-burr nylon mesh upper with no-sew thermo-adhesive synthetic reinforcements. TPU toe cap for added durability. Abrasion-resistant microfiber lining for breathable interior comfort. Lace-up closure with a sandwich mesh tongue. 4mm Ortholite insole for a cushioned underfoot comfort. Cushioned midsole featuring compression-molded EVA with Infinitoo inserts that use PU foam for high-energy return and sustained cushion over time. 1.5mm dual-density compressed EVA rock guard (in forefoot) and TPU STB inserts protect feet from rocks and abrasions. FriXion XT 2.0 with Impact Brake System and flex inserts provides superior traction and excellent grip. Lug depth: 3 mm. Imported. Measurements: Weight: 10 oz Product measurements were taken using size 40.5 (US Womens 9), width B - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.