Features of the Hydro Flask 20L Day Escape Soft Cooler Pack Watertight zipper and welded seams ensure leak proof transport Durable 600D polyester shell is ultra-light and waterproof Padded mesh back panel and padded shoulder straps for a comfortable hands-free transport Woven sternum strap and carry handles Compression molded base for unsupported self-standing FDA food grade, BPA-free liner Stretch mesh side pocket holds a 32 oz Hydro Flask bottle Laser cut welded loops easily attach our Dry Storage accessory