(TrendHunter.com) The Nike ACG Mountain Fly 2 trail sneakers have been shown off as a footwear style with performance, protection and comfort in mind to help wearers easily tackle their favorite trails. The sneakers... (TrendHunter.com) The Nike ACG Mountain Fly 2 trail sneakers have been shown off as a footwear style with performance, protection and comfort in mind to help wearers easily tackle their favorite trails. The sneakers...