YiKaiSu 30L Waterproof Outdoor Hiking Camping Daypacks Climbing Trekking Backpack Mountaineering Travel Bag Unisex High-capacity Wide breathable mesh shoulder straps. Easy to adjust the length and lock firmly. High quality Two-way zipper goes smoothly. Main pocket for 10-15.6 inch laptop, compartment inside the bag can hold ipad. Two large side mesh pockets for water bottles or umbrella. Powerful handling capabilities, high-capacity load space. Side of the backpack is nylon plug design, easy to carry trekking poles and other items. This backpack is owned computer compartment with elastic rubber band fixed, you can put 10-15.6 inch laptop. Multipurpose: outdoor travel, hiking, trekking, camping and other outdoor activities.