Rubber sole| Performance Sneaker: These neutral trainers feature cushioning and responsiveness at a reduced weight to elevate the running experience with QUIKSPRING+; a molecular modified base EVA material.| Ultimate Upper: The breathable upper features a seamless engineered mesh for a lighter; sleeker; and in general; more comfortable fit.| Optimal Insoles: The open-cell Orthite insoles utilize 20% recycled* content while still being able to utilize long-lasting comfort; excellent moisture management; a high-level of breathability; and performance that runners need.| Advanced Design and Enhanced Visibility: The Tongue migration is eliminated through the STAYPUT design. The enhanced visibility and protection comes from the reflective printing on the heel that illuminates in low light.| Feel Good Fit: The Pressure Free Tongue removes pressure to the ankle during dorsiflexion and stress from the top of the foot by combining super-soft materials with an anatomical pattern and thin padding.