Heathered gray material made from recycled PET bottles has an antimicrobial coating on exterior and lining. Water resistant coating on exterior only. Fully padded 15.6-inch laptop compartment with lockable zippers and RFID data protection pocket helps secure personal data encoded on your credit cards, IDs and passports. External USB port, internal iPad/tablet pocket, and headphone port add extra convenience to carrying around your accessories. Checkpoint friendly design allows you to pass through airport security faster. Back strap slides over luggage handle.