NEUTRAL: For runners who need flexibility, cushioning and versatility. The mesh upper is extremely lightweight and breathable, with strategic support where you need it. The ¾-length sockliner hugs the midfoot and forefoot, for a more secure and comfortable fit. Integrated insole for added cushioning and seamless comfort The Charged Cushioning midsole is firmer in the heel and softer in the forefoot for added support and comfort. The solid rubber outsole covers high-impact areas for greater durability with less weight.