Inspired by Special Forces training, GORUCK Rough Runners Ruck Shoes are built to handle the toughest training conditions imaginable. Simply running in a straight line is not enough for your way of life, that’s why Rough Runners are built with the versatility to do all the things. The Road-to-Trail Outsole features two rubber compounds to deliver performance on any terrain. The Gradient Density™ EVA Midsole is custom-formulated to provide cushioning and rebound with better long-term durability than any other running shoe on the market, with more bounce that gradually becomes more stable towards your heel. Lace-lock eyelets create a tight heel lock to reduce heel slippage and excessive movement around the ankle. Dense, PU foam contours of the foot supporting all three arches of the foot. Comfortable PU foam bolsters lock in the heel to prevent slippage and excessive movement around the ankle. Seamless, one-piece 100D polyester mesh provides breathability and flexibility without cramping your toes. High-wear areas are reinforced with a protective TPU film for abrasion resistance and enhanced durability. A 10mm heel-to-toe drop gives enough of a lift to reduce the strain on your achilles tendon and support your heel strike. A reflective pull tab on the back heel keeps you visible while running in low-light conditions.