Made with durable 900D recycled polyester, the Platinumena Polyester Water Bottle backpack holds all necessary functions. It features a padded laptop sleeve suitable for a. ” Laptop, an extra sleeve for a small notebook or tablet, and zipped pockets for smaller items. Additionally, there is an elastic strap on the inside for water bottle placement. The back of the backpack holds a convenient elastic strap, making it easy to attach to a trolley.”