Ease into the Ultra Glide 4 and feel the difference. The latest version 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 up stack up the miles, comfortably. Cushioning: Maximal Drop Value: 6 MM Foot Protection: High Lug Depth: 4 MM Run Frequency: 4 or more runs per week Type of Trail: Distance Run Weight per unit: 10 OZ Width: Regular Terrain: Mixed terrain Lacing System quickLACE(TM): Minimalistic and strong lace for one-pull tightening. Easy-on, easy-off. Inlay Sole Textile Lining Textile Outsole Rubber Upper Textile / Synthetic Material Engineered Mesh: Engineered mesh is a structure that varies the weave to offer more support and durability or flexibility and breathability, according to the specific needs of the shoe. Midsole optiFOAM: Lightweight & cushioned EVA foam for a performance usage. Outsole Type All Terrain contaGRIPA(R): Our All Terrain contaGRIPA(R) 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. Upper Construction endoFit(TM): An internal fit sleeve designed to hug the foot in exactly the right places and provide a precise fit.