When the trail gets technical, Fast-Trac 4 gets to work. This nimble, moderate-stack trail runner is designed for speed and control on steep climbs, loose descents, and rugged terrain. Now more durable than ever, it features an advanced NITROFOAM™ compound for high-rebound cushioning without the weight. The aggressive outsole provides grip with deeper lugs and our toughest PUMAGRIP ATR rubber yet. Reinforced with a structured upper, toe cap, and mudguard skins, Fast-Trac 4 is your fearless partner in the mountains: light on foot, heavy on performance. These shoes will elevate your trail running experience.