Ease into the Ultra Glide 4 and feel the difference. This latest evolution of our most comfortable trail running shoe is now even lighter and more breathable, delivering a more dynamic, performance-enhancing ride and cooler feet in hot or humid conditions. With improved durability, you'll stack up the miles comfortably. DESIGN: Maximal cushioning for plush underfoot feel 6 MM drop for balanced stride support High foot protection for rugged trails 4 MM lugs for confident multi-surface grip Optimized for distance runs on mixed terrain 10 OZ per shoe for lightweight agility IN-SHOE COMFORT: Lighter, more breathable upper keeps feet cooler Smooth, dynamic ride for daily mileage and long runs Comfort tuned for 4+ runs per week DURABILITY & TRACTION: Enhanced durability to handle high-mileage training Trail-ready outsole with 4 MM lugs for reliable bite Built for mixed terrain performance in hot or humid conditions