Scarpa Spin Infinity GTX Trail Running Shoes designed for long distance runners combine ultra-cushioning cushioning, stability and support helping our legs endure long distances. Easy Breathable mesh upper reduces weight and removes debris and GORE-TEX Invisible Fit technology provides lower volume and better breathability than traditional GTX waterproof boots. Dual-density midsole features additional shock-absorbing lugs in the heel and forefoot with stabilizing features elsewhere providing a combination of comfort, stability and support to keep our feet happy mile after mile. Finally Vibram Mega Grip outsoles provide superior control on all surfaces wet or dry, with ridges designed to overcome steep climbs and braking on steep descents. This is the ultra package for our ultra runs.