Ultralong distances and harsh conditions don't stand a chance against this high-performance shoe that's been a worldwide icon since 2013.Perfect for: Ultradistance trail runners who demand both high performance and deep regard for the planet from their gear and its makers.Upper: Single-layer mesh overlaid with abrasion-resistant thermoplastic polyurethane—both of which are mixed with recycled materials—form a lightweight upper, with the brand's EndoFit™ construction and Quicklace® closure combining for a secure, foot-cradling fit.Midsole Drop: 10mm, the most common and generally considered to be the ideal standard for running shoes. Classified as a high-drop measurement, it allows for more cushioning to absorb the impact of heel strikes.Lower: The Agile Chassis System, lugged sole and EnergyCell midsole ensure stability (even on downhill grades) and comfort to see you through your longest runs. Trail: provides superior stability and traction on hills, uneven surfaces and changing terrain Stability: helps maintain comfortable foot alignment with targeted cushioning and support Quicklace closure offers one-pull tightening Removable OrthoLite® insole allows for custom orthotics Agile Chassis System maintains heel-to-toe stability on distance runs Textile and synthetic upper and lining/rubber sole Imported