This Mountaintop 40L outdoor backpack measures 21.7*13*7.9 inches and is crafted from tear-resistant and water-repellent polyester. It features multi-compartment storage for a 15.6-inch laptop and small items, along with breathable mesh padding and an ergonomic back system. Equipped with bottom direct access, water bladder compartment and gear fixing straps, it suits daily commuting and various outdoor activities. Multiple color options make it a practical gift as well.