TARGUS 15.6' Cypress EcoSmart Security Backpack for Laptop Notebook Tablet - Up to 15.6', Made with 17 Recycled Pastic Water Bottles - Grey 21LTargus 15. 6' Cypress EcoSmart Security Backpack for Laptop Notebook Tablet Up to 15. 6', Made with 17 Recycled Pastic Water Bottles Grey 21L Features: Made from 17 recycled plastic water bottles Single interior compartment opens backward for enhanced security No external zips or pockets Padded laptop pocket Structured design keeps bag standing upright Ergonomic, padded shoulder straps and air mesh pack panel for comfort Luggage pass through trolley