Released in 2013, the  XT-6 was designed as a trail shoe for athletes competing in ultra-distance races. The foam midsole with full-length Agile Chassis System (ACS) gives superior cushioning & support whilst breathable mesh uppers are made more durable with a welded TPU film. The incredible performance stats probably don't mean much to any of us as these are unlikely to see much aside from a light shower and some dust as you step off the footpath.