La Sportiva Jackal Running Shoes - Men's Black/Clay 41.5 Medium. Every detail from the uppers to the sole is designed to enhance the comfort of the foot over long distances: wide comfortable fit designed for use in ultra-marathons comfort fit enveloping and soft elastic tongue for maximum freedom of movement with internal bellows to protect against stones and mud. The lacing sees the loops incorporated directly into the side panels of the uppers: a solution that facilitates the adaptation of volumes during long distance runs in which the foot tends to swell. The lateral Net-Mesh promotes ventilation and climate comfort. The heart of Jackal however lies in the innovative EVA sole/midsole package with internal cushioning pads in high Energy return polyurethane Infinitoo Technology. The front element increases the cushioning the rear insert contributes to the stabilization of the run. The midsole also incorporates a high-density EVA Rock-Shield for a more stable run with rock-guard effect. The Frixion Red tread with differentiated Impact Brake System lugs and longitudinal FLEX grooves enhances the flex of the sole along the fold lines. The lightweight shock-resistant thermo-shaped toecap contributes to the overall lightness and protection of the shoe while the dual compound FriXion Red sole guarantees maximum grip and durability. A concentration of technology inspired by those who run in search of their own limits and in search of themselves . Jackal: find your ultra. Specifications for La Sportiva Jackal Running Shoes - Men's: Manufacturer: La Sportiva Men's Shoe Width: Medium Activity: Trail Running Gender: Male Weight: 10.5 oz Age Group: Adults Footwear Upper Fabric/Material: Sandwich Mesh (Toe/Tongue)/No-Sew Thermo-adhesive Reinforcements/Breathable Mono-burr Nylon inserts/TPU toe cap Insole Material: 4 mm Ortholite Outsole Material: FriXion XT 2.0/FLEX Inserts/3mm lugs Midsole Material: Compression Molded EVA w/Infinitoo PU inserts/1.5mm Dual Density Compressed EVA Rock Guard underfoot Lining Material: Abrasion Resistant Micro-fiber Footwear Type: Shoes Features of La Sportiva Jackal Trailrunning Shoes - Men's Comfortable wide fit designed for ultra-marathons Soft stretch tongue provides a comfort fit for maximum freedom of movement the internal bellows construction provides protection against stones and mud Innovative EVA sole/midsole package with internal shock absorbing polyurethane pads with high return energy thanks to the Infinitoo Technology. The front insert increases cushioning while the rear insert contributes to the stabilization of the run Package Contents: La Sportiva Jackal Running Shoes - Men's La Sportiva 46B-999311-42.5: Jackal Running Shoes - Men's Black/Poppy 42.5 Medium La Sportiva 46B-999909-41.5: Jackal Running Shoes - Men's Black/Clay 41.5 Medium La Sportiva 46B-999311-46: Jackal Running Shoes - Men's Black/Poppy 46 Medium La Sportiva 46B-999909-43.5: Jackal Running Shoes - Men's Black/Clay 43.5 Medium La Sportiva 46B-999311-44.5: Jackal Running Shoes - Men's Black/Poppy 44.5 Medium La Sportiva 46B-999311-43: Jackal Running Shoes - Men's Black/Poppy 43 Medium La Sportiva 46B-999311-43.5: Jackal Running Shoes - Men's Black/Poppy 43.5 Medium La Sportiva 46B-999909-44.5: Jackal Running Shoes - Men's Black/Clay 44.5 Medium La Sportiva 46B-999311-42: Jackal Running Shoes - Men's Black/Poppy 42 Medium La Sportiva 46B-999909-45.5: Jackal Running Shoes - Men's Black/Clay 45.5 Medium La Sportiva 46B-999909-43: Jackal Running Shoes - Men's Black/Clay 43 Medium La Sportiva 46B-999909-44: Jackal Running Shoes - Men's Black/Clay 44 Medium La Sportiva 46B-999311-44: Jackal Running Shoes - Men's Black/Poppy 44 Medium La Sportiva 46B-999909-41: Jackal Running Shoes - Men's Black/Clay 41 Medium La Sportiva 46B-999909-42.5: Jackal Running Shoes - Men's Black/Clay 42.5 Medium La Sportiva 46B-999909-45: Jackal Running Shoes - Men's Black/Clay 45 Medium La Sportiva 46B-999909-42: Jackal Running Shoes - Men's Black/Clay 42 Medium La Sportiva 46B-999311-44: Jackal Running Shoes - Men's Black/Poppy 44 Medium La Sportiva 46B-999311-45.5: Jackal Running Shoes - Men's Black/Poppy 45.5 Medium La Sportiva 46B-999909-41.5: Jackal Running Shoes - Men's Black/Clay 41.5 Medium