Klim Fuel Pak Stay hydrated so you can stay on the trail without coming back early. Light and mobile, the Klim Fuel Pak has got you covered. Main Features Main compartment accommodates up to 3 liter hydration bladder 3 liter hydrapak hydration reservoir included Internal zippered pocket 4 hydration tube exit ports [2 top, 2 bottom] Light shoulder straps with airflow Sternum strap with integrated whistle Reflective hits Fuel gauge clear back to see into hydration content 3 deep x 7 wide x 17 tall Hydrapak Reservoir Features 3 liter [100 oz.] hydration reservoir Push button quick release hose connection (bladder and hose can be separated allowing bladder to be removed and hose to remain threaded through pack) Fold and slide wide opening for easy cleaning/filling (can pull inside out for cleaning and drying) 48 pinch-resistant heavy duty drink tube can be cut to desired length Constructed of fda approved polyurethane Anti-microbial Extremely tough Straight valve high flow rate mouthpiece with 360 degree bite One-handed locking on/off positions BPA and PVC free allows taste-free water