The Posture Vertical Backpack is the first backpack of its kind designed specifically to optimize body posture. Its unique and ergonomic carrying system allows the weight to be positioned close to the center of gravity at the sternum. This naturally expands the chest, engages the core muscles, and positions the head over the shoulders, while the spine rests in an S-curve and the hips and knees are properly aligned. This innovative design also provides your shoulders with free range of motion, making the backpack feel significantly lighter. The Posture Vertical Backpack is the ideal companion for the office, the gym, or a weekend adventure. It is perfect for hiking and biking, and offers a great fit for both men and women. Made from waterproof material, the backpack also features a USB charging port, a trolley strap, a laptop compartment, and several additional pockets, including a hidden one for valuables. The top of the backpack is foldable to increase or decrease its volume.