Both lightweight and highly durable, the upper keeps you cool and dry while the outsole with a dual density rock guard provides the ultimate underfoot security. The innovative midsole is a perfect blend of compressed EVA with Infinitoo PU inserts for the ideal cushion and stability. Innovative combination of EVA and Infinitoo PU inserts in midsole for long-distance cushion and trail stability Near-seamless uppers mean less hot-spots Dual density rock guard throughout the shoe for ultimate underfoot protection Designed for runners looking for plush cushion, a wider fit and higher volume, the Jackal II trail-running shoes keep your feet steady and stoked for long runs through rough and technical terrain. The updated model maintains all the best aspects of the original now with new eco-friendly upper materials, a new heel/tongue construction and enhanced breathability - all at a significant weight reduction from the first generation.