The Woodland Cooler Backpack is constructed of a heathered, 600D polyester that is coated with PVC for water-resistance and durability. Boasts a large main compart that has dual zipper tabs and is insulated with pearl cotton and lined with easy to clean aluminum film. Multiple pockets and pouches provide for ample storage of water bottles and personal items. Adjustable padded shoulder straps provide comfort on the trail or park