The instructions are a little vague but I figured it out. I have size 14 feet and bought the xx large. nike zoom air running If money isnt an issue then strongly recommended. I like them though. nike zoom air running All you need is a flat head screwdriver to remove the small metal collar off the old ones. nike zoom air running The box design is really good as it worth the money. Matches more of my wardrobe than I had even hoped for. It still has the baggy effect at the waist. nike zoom air running Do keep in mind that the strap across the toes is not adjustable. Super easy to install and very sturdy.
nike zoom air running