Crest Design Water Repellent Convertible Multipurpose Backpack (Large, Black) Convertible bag can be worn like a backpack, tote, or cross-body messenger bag. Comes with a detachable cross-body strap. Made with super-durable, lightweight water-resistant nylon material. Sturdily constructed with detailed top-stitching, and fully lined with polyester fabric. Sholder straps are durable and comfortable cotton canvas. Perfect for travel, sports, gym, fitness, camping, hiking, school, and anything from a day of shopping to a day at the beach! Features a zippered main compartment, three interior slip pockets, and one interior zipper pocket to organize your essentials. A zippered exterior front pocket provides easy access to your essentials. Two exterior side pockets can hold your water bottle, umbrella, and other personal accessories. 12.6"L x 18.5"H x 5.1"D (Large); can fit a laptop up to 17". All Crest Design bags include a one year worry-free warranty for quality assurance.