This water-resistant backpack has 4 total pockets. Multiple compartments nicely organize all of your accessories. Padded back keeps your back cool and dry in any climate. Adjustable padded shoulder strap secured by clip as well as Velcro. Sits across your body in an extremely comfortable way for all day use, whether for school, hiking, or travel. Strap includes cell phone compartment perfect for always having your cell phone near and electronic protection. This back pack is great for travel, business or school. Available in two specific sizes to meet your needs for the day ahead. Product Dimensions (Inches): Regular Size: 18" x 14" x 8" Small Size: 16" x 11" x 5"