BÉIS The Expandable Backpack | Bloomingdale。DESCRIPTION You need a backpack to do it all... and more. The Expandable backpack is made of recycled plastic water bottles and can suit your every need. Two hands available for travel is one of the most underrated luxuries backpacks so perfectly provide. Here it is, complete with every pocket you need, a laptop sleeve, key leash, a water bottle pocket that can be tucked into the inside and zipped away. Once it’s fully filled, it can be zipped open to hold even more. Over-packers rejoice! For men, women, teens and kids.