The length of an outing or weather dictates how much gear you'll need. Our hydration bag has incredible cargo capacity via a unique expandable pocket, along with stylish looks, and TPU non-toxic water reservoir. Features & Specifications: Easy fill, easy clean via the water reservoir. Expandable storage compartment gives you flexibility. Removable sternum strap and waist belt included. Strap management secures loose webbing. Capacity: 2-3 liter Different style of hydration bag as below: 1.CHARMING FOR OUTDOOR CHALLENGE 2.CLASSIC FOR URBAN ADVENTURE 3.STREAMLINED FOR DRINKING ON-THE-GO Welcome to visit our web:www dot jooyoo dot com to find more valuable products and contact us directly!