BREATHABLE MATERIAL FOLDABLE - Made from lightweight,breathable mesh back panel and high-quality nylon fabric.It is a foldable water backpack that is easy to carry.Expanded size is 23.6 inches X 18 inches.
THERMAL INSULATION - The internal insulation of the Hydration backpack lasts for 4 hours to keep your liquid cool. There is no doubt that this is the best choice for running, hiking and cycling.
REPALCEABLE 2L BLADDER - The hydration backpack comes with a built-in 2L water bag for easy water carrying. The high-quality water bag is made of EVA material, BPA free and FDA approved. It has an ultra-wide diameter 3.1-inch screw cap for easy watering and ice laying. Our water bladders passed pneumatic pressure test, 24 hour swing test and 24 hour vibration test. It is completely pressure-tolerant and leak proof.
NIGHT REFLECTIVE STRIP - There are several nighttime fluorescent reflective strips on the outside of the backpack. It is safer to travel at night.
MULTIPLE STORAGE BAG: This hydration backpack has multiple pockets that give you all the space you need to store your various necessities. Whether it's an cycling helmet, your cell phone or your keys as well, the differently sized pockets will suit all your storage needs perfectly as required.