Must Equipment for Outdoor Sports. hydration pack comes with a built-in 2L EVA replaceable bladder that allow you to carry your water conveniently. It includes a wide screw cap so you can add ice cubes for an cool drink. The best gift for anyone who loves outdoor sports such as hiking, camping, climbing, biking, cycling, walking, or running.
High Quality Material.This hydration pack measures 18 in x 9 in x 2 in and weighs only 16 ounces（include bladder）. Made from lightweight,breathable mesh back panel and high-quality nylon fabric,designed to keep you cool and dry while on your outing.Very attractive,comfortable and durable.