On Women's Cloudboom Strike Running Shoes White Horizon Nike running tolerance helps you understand running tolerance helps you understand the real impact running has on your body so you can adjust your training to avoid overload and improve The addition of vents ensure optimal levels of breathability and a regulated body temperature whilst the zip pocket keeps all your items secure Sizing Advice Your running shoes should have enough width to allow you to spread your toes and should have some space at the front (we recommend having a half to one thumb's width of space from the end of your longest toe to the front of your running shoes)