TRU-SPEC Hydration System Backpack - 4796000. 5-l Water Bladder With Insulated Drinking Straw attached D-rings To Hang Gear drain Hole 18"x 7-1/2" Specifications for 5 Star Gear 5 Star Gear - Hydration Backpacks: Color: Black Army Digital Package Contents: 5 Star Gear 5 Star Gear - Hydration Backpacks backpack hydration hydration Black Features/Specifications: Constructed of durable Ballistic Weave material Fully adjustable shoulder straps with quick release sternum strap 2.5L bladder pocket w/ right or left opening hose exit Includes 2.5L bladder with insulated drinking tube Easy grab top carry handle on top and front of bag Attached d-rings to attach equipment or gear Plastic drain grommet Great for hiking camping and traveling