Spin Ultra is a trail running model for top runners as well training enthusiasts. High-performance, agile and responsive with excellent cushioning and protection for running long distances and extended training sessions. Outstanding fit, precise fastening, exceptional responsiveness and a high level of cushioning. Technologies Autofit Collar - The AUTOFIT COLLAR, thanks to the ergonomic design of the collar and to the special padding, ensures the maximum adaptability and comfort of the upper, reducing the impact stress that rests on the Achilles and malleous area. Great performance and comfort on any terrain. Vibram® : Vibram® is the world leader in high performance rubber soles and compounds, targeted to the outdoor, work, recreation, fashion, repair and orthopaedic markets. Vibram® Megagrip : VIBRAM® Megagrip offers excellent grip properties on both dry and wet terrains while maintaining a high level of durability. Sock-FitSystem - On the Trail Running models, the tongue is constructed in a single piece of elastic fabric which allows a light wrap around your feet, offering a snug feel and lateral stability. Vegan Friendly Features UPPER : In mesh with applications in heat-sealed TPU film, integrated with a shockresistant 3D TPU toe cap. Tongue in lightweight and breathable fabric with pocket for laces. The upper wraps the foot like a sock thanks to the Sock-Fit LW construction system, avoiding pressure points and ensuring maximum comfort and precision fit. LACING : Lacing system integrated with the upper. SOLE : Velox LB Max sole with midsole in compressed medium-density EVA, inserts in low-density EVA on the heel and forefoot to ensure maximum cushioning and ergonomic ESS insert to ensure stability. The Vibram® Litebase technology has the advantage of reducing the thickness of the outsole for a balance of sensitivity and protection on rocky terrains. High grip and traction on any terrain thanks to the Vibram® Megagrip compound; the outsole has 4mm deep spaced lugs which facilitate the expulsion of earth on rocky and muddy terrain, making them more efficient. STACK : Heel 24mm/Toe18mm. Drop 6mm LINING ; Stretch Textile WEIGHT: 560g