Falcon Backpack Perfect Daypack or Bookbag for Hiking College Travel or Day Trips Water Resistant Black Back Pack for Men or Women TRAVEL WELL: A practical and well designed medium-duty backpack for all your travel, hiking and camping needs. Whether you use it as a book bag, daypack, or packing it up while traveling to school or college, you will find this to be a convenient and handy bag. LOTS OF SPACE: Main compartment offers a roomy space that will hold any full size laptop and all your accessories and books, or everything you need for a day hike or outing. EVEN MORE SPACE: The Innovative zip-open extension gives you 25% more space when you need it, and folds up compactly when you don't! GREAT FEATURES: Reflective silver stripe for better visibility at dusk. 5 zip pockets to organize your gear. Comfortable waist strap really helps when you are loaded down. Water resistant! AND THE DETAILS: Pack size is about 18"H x 13"W by 8"D when fully loaded, around 30L. The zip-open extension adds another 5" of height, equivalent to about 40L. Note that the maximum weight rating is 25lbs.