Nathan Trail Mix Plus Insulated Hydration Belt Ergo-shaped soft monofilament belt offers multi-directional stretch that eliminated bounce Speed fit holsters provide easy, one-handed, on-the-fly access to hydration and nutrition Two 10 oz/300 ml insulated flasks with push-pull caps Zip pocket with key ring clip and front stash pouch for gels and fits iPhone 7 plus Elastic keepers neatly hold excess straps