For 2014, Our popular ultra-light hydration pack is enhanced with internal compartments, Plug-N-Play technology and full size zip loading; improving capacity while keeping the pack"s original minimalist intent. According to bicycling magazine "It takes some pretty fancy engineering to make 70 ounces of water nearly disappear on your back. Yet, that is exactly what Hydrapak does with it"s impossibly light (7 ounces empty) Avila hydration Pack.".