Salomon S/Lab Ultra Glide v1.5 - Ultra Trail Marathon Shoe

You can't trade out for another runner at mile 70 so why should you wear a shoe that can't go the distance and duration you're running? Salomon realized there was a need for a shoe that can hold up to a 30 to 40 hour ultra marathon so they created the Salomon S/Lab Ultra Glide. Designed specifically for runners who run an ultra between 30 to 40 hours.  Details  "So how does as shoe hold up to 30 to 40 hours during an ultra-marathon" you might be asking. Salomon created a dual layer midsole made of highly responsive supercritical Energy Foam + on top and stable/durable/cushioned Energy Foam on the bottom. This allows the runner to take advantage of the ability to run early on and the downhills while providing the cushion, stability and durability needed by the 30 hour mark.  In order to allow the dual density midsole to do its job the outsole is designed to disperse pressure across the surface area of the shoe. By doing so it removes compression points that prevent that shoe from doing