<p>This Ozark Trail Pearson Creek Hydration Pack is ideal for camping, hiking, or trekking. The backpack includes a 2 liter hydration reservoir (BPA-Free) to keep you hydrated when you need it. The backpack features a bite switch with on/off valve with a left or right hose port system to give you the choice of what side you want to use. You can quickly and easily access the reservoir compartment on the front of the backpack to load or unload the included hydration bladder. The zippered accessory pocket is great to hold small items that you would need during your activity. The lightweight breathable mesh shoulder straps along with the adjustable sternum strap make it easy and comfortable to carry. This 2.3" x 9.4" hydration backpack will hold a 2 liter bladder. It is suitable for a senior, adult, teen and kids. The hose fittings need to be tightened before the reservoir is filled with water. </p>