Take your travels to the next level with our multifunctional expandable backpack. Made with durable Oxford material and polyester composition, it is waterproof and anti-theft. With a capacity of 23.5-28.8L, it can fit a 15.6 inch laptop and has a built-in USB port for convenient charging. The SOS whistle adds an extra safety feature for any outdoor activity. Travel, trek, bike, or ride with ease.
