The S/Lab product line is designed for race performance, without compromising a single drop of efficiency. The S/Lab Ultra Glide shoes feature a dual-foam midsole, combining two types of cushioning foams to help you power through even the longest endurance challenges. A great choice for ultra distance races that take all day or more, as well as long exercise runs! The All Terrain Contagrip outsole provides a well-balanced grip on various surfaces. Why does the sole of these shoes look the way it does? First, these shoes feature an exceptionally thick layer of cushioning foam for Salomon footwear. Additionally, the eye-catching wave-shaped "Relieve Sphere" structure helps reduce pressure and impact even further. - Energy Foam and Energy Foam+ cushioning foams (EVA and PEBA) in the midsole - Salomon Quicklace system for quick and secure tightening - 4 mm tread depth for traction - 6 mm drop for a balanced stride - Heel stack 41 mm, front 35 mm