The Overnighter Backpack M has a large zippered lid that allows quick access to the main compartment. The flexible 2-way zipper makes packing and using the backpack particularly practical. There is also an outer compartment with an XXL zipper that allows one-handed access. Inside the lid there is another zippered compartment that can be used for headphones, keys or other important items that need to be secure but still quickly accessible. The backpack also has an easily accessible, padded laptop compartment for the safe transportation of a laptop up to 15.6 inches in size. The compartment also allows quick access during security checks. A carrying handle makes it easier to hold the backpack when it is not being carried on the back. The well-ventilated mesh back ensures optimum carrying comfort, even on hot days. Adjustable and padded shoulder straps protect the back and ensure a comfortable fit. The Twist outer material consists of 50% robust, resource-saving material made from recycled PET bottles, which makes the backpack durable and sustainable. The Overnighter Backpack M is also water-repellent, so that even rain is no problem.