Apple of my Isla Backpack GUC The Backpack is equipped with an outer zipped pocket and two drink holder sleeves. The small fits a pocket folder. Made with our PVC-free, wipeable, non-chlorinate coated fabric that is soft to the touch, antimicrobial, water resistant, odorless and biodegradable. This fabric has been specifically developed to be a healthier and more environmentally friendly alternative to the traditional coated material of toxic PVC.