Nathan Speed 3 Waist Pack with Three 7-Ounce Nutrition Flasks Streamlined (to reduce weight) molded holsters for quick, one-handed Flask access Three 7 oz. nutrition flasks with race cap strategically placed for intuitive access without interfering with arm swing Dimensional Power Stretch Mesh pocket expands to hold items snugly in place - no need to fumble with zippers or closures Velcro-fastened Titanium Belt is light and strong, with an open construction to dissipate heat and reduce chafing Canted waist allows pack to sit low on hips without riding up