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2L Hydration Bladder Included: The 2L BPA-free bladder made from BPA free food grade material and tasteless, 3.7inches large opening for ice filling and cleaning the bladder easily. Gently bite and pull the tip of the valve with front teeth, and push back to stop water flow. Enough to get you through a day of hiking, cycling, running or biking.
COMFORTABLE CARRYING SYSTEM: Designed with adjustable shoulder and chest straps, which can secure the molle hydration pack in place to eliminate any bounce or rubbing. Breathable air cushion helped breathable perspiration, maintain a comfortable state promising an enjoyable and comfortable all-day carry.
MUTIPLE COMPARTMENT：This 3 days survival backpack has four zip pockets that means you can carry your necessary items conveniently.There are 2 main compartment and 2 Small pockets In Front. The front pocket with two adjustable buckles can provide extra space for helmets or other items.
Insulation for 4 Hours: This army backpack has an insulation compartment made of thick aluminum foil, which can hold a 2L water bladder and can be liquid cooling for up to 4 hours. There are two tapes on the top to ensure that the bladder does not bounce during your hiking. You can also carry IPD lunch boxes in the extra spaces.
100% FULL REFUND GUARANTEE: Absolutely no risk. If you are not satisfied for any reason, money back guarantee! Welcome to contact us if you have any issues or are unhappy with our tactical hydartion backpacks (NO RETURN REQUIRED if it is a defective item), we will help you solve it out in 24 hours. Package Included: 1 ×Hydration Backpack, 1×US Flag Patch.