Ease into the Ultra Glide 4 and feel the difference. The latest version of Salomon's 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 up stack up the miles, comfortably. optiFOAM: Lightweight & cushioned EVA foam for a performance usage. All Terrain contaGRIP®: Salomon's All Terrain contaGRIP® is built for the widest variety of surfaces. It delivers durability & confidence on wet, dry, hard or loose surfaces. Relieve Sphere: The distinctive, wavy geometry of the outsole is specifically designed to diffuse pressure and to break down repeated underfoot impact for enhanced, durable comfort. Shoe Category: Neutral Surface: Trail Running Drop: 6mm Lug Depth: 4mm Weight: 285g