Hydration Day Pack Backpack with 2 Liter Water Bladder Great Looking Hydration Backpack with Many Pockets Includes 2 Liter Hydration Bladder and Tubing. Easy to clean hose and bladder. Water consumption controlled by bite valve. Leak proof cap. Includes a double locking mouthpiece Overall size of pack is about 18" x 10". Available in Green or Blue (you will receive a random color. Red is no longer available) Great for Hiking, Walking, Cycling, Mountain Biking, Running, Snowboarding, Skiing, Fishing, Kayaking, and Day Trips