This black Porter-Yoshida & Co. Tanker Daypack backpack is crafted from a lightweight material. It features a grab handle, shoulder straps, a zip main compartment, internal laptop sleeve, front zip and velcro pockets, side snap pockets and branded details. One of the largest ocean tankers called the Seawise Giant had a capacity of 564,763 tonnes. While that's impressive, this Porter-Yoshida & Co. Backpack can carry our laptop, keys, wallet, water bottle and our gym gear. We know which we're more taken with. Color: black