- Large capacity expandable design up to 42L for 3-7 days of travel essentials. The spacious main compartment includes straps to secure travel supplies, a separate 17-inch laptop compartment, and a hidden anti-theft pocket on the back for valuables. It has a 20147 size. Please check the size before purchasing. - Flight approved carry-on backpack: designed for travel with two padded handles for easy switching between backpack and suitcase. A luggage strap on the back can slide over luggage. It fits overhead bins and under the seat in standard carry-on configuration. Ideal for men, women, weekend travelers, or occasional vacationers. - Durable materials and anti-theft security: built from durable, water-resistant polyester and anti-scratch material. Sturdy metal double zipper and upgraded reinforced stitching for longevity. Includes an anti-theft lock to reduce worry during travel, camping, or cruises. - Hidden shoulder straps and breathable comfort: breathable mesh design and padded shoulder straps promote air circulation, ventilation, and heat dissipation to relieve shoulder stress. Hideaway padded shoulder straps can be stored in the zippered back panel when not in use. - Use cases: suitable for travel, business trips, camping, or cruises, with expandable capacity to cover 3-7 days of essentials.