Breathable mesh surrounds the upper The upper is able to stretch, whilst able to hold the foot in place Strong walls hold the heel in place to avoid injuries ComfortRide EVA offers supreme support as well as cushioning Long lasting rubber with grooves to offer long-lasting grip and stability Designed for new and experienced runners alike, the 520v7 running shoes are built to enhance your natural stride. The ComfortRide EVA midsole offers full-length cushioning that's bursting with energy, helping to move you forward. Enjoy a seamless, supportive fit and an ultra-athletic aesthetic.