Salomon S-Lab Sense 4 Ultra : A newly designed outsole makes Salomon S-Lab Sense 4 Ultra running shoes great for running on a variety of surfaces, including hard, wet and loose terrain. Even more mesh than on the previous version, this update is more breathable and flexible than before. At night, the back half of the S-Lab Sense 4 Ultra will reflect light to keep you more visible. Upper:Mesh offers flexible breathability. A protective TPU Toe Cap provides strong foothold support and side protection. A low-cut profile delivers freedom of movement. SensiFit™ cradles the foot, providing a precise and secure fit. QuickLace™ offers one-pull tightening and a Lace Pocket provides easy storage for the QuickFit™ lacing system. Midsole: EndoFit provides exceptional comfort and fit. ProFeel offers protection from the trail. Molded EVA midsole provides underfoot cushioning. OS Tendon flexes with your foot to deliver stretch and balance during the heel-to-toe transition. Outsole: ContraGrip® delivers optimal traction on varied surfaces. Dynamic Traction uses offset lugs to provide unparalleled grip on hard, wet and loose surfaces.