OP store Hydration Backpack --Professional Outdoor Sports Hydration Backpack for You! Ergonomic design: Made of lightweight materials and adjustable chest and waist straps,keep the pack from moving,reduce the burden of your shoulder while on your outing! Hands-free water bladder:The water bladder equipped with a tube and easy to use On/Off bite valve to drink, hold the tube on the holes in the shoulder straps,you don't need to hold it to drink! Features: Hydration backpack with replaceable 2L water bladder make it a good choice for outdoor sports. BPA-free and FDA-approved food grade water bladder. Lightweight,comfortable and durable. Padded Breathable back system Adjustable shoulder and chest straps fit you perfectly. Multi-functions for various usage. Easy to fill water, drink,and clean. Insulated System: Normal one can keep insulated for 4 hours, and the built in clooer version can last for above 5 hours Applications: Cycling, hiking and other sporting activities. NOTE:If you are not absolutely happy with your purchase for any reason,please contact us for a replacement or full refund.
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