This Mountaintop 40L lightweight backpack for men and women is made of water-repellent 400D polyester and equipped with premium Ykk zippers. It features multi-pocket storage that can hold a 16-inch laptop and daily items. The breathable mesh structure with sponge padding and whistle chest clip ensure comfortable carrying. With a dedicated water bladder compartment, it is ideal for various outdoor activities and a nice gift option.