Fabric material - Polyester Multifunctional design - Two padded handles allow easy switching between backpack and briefcase carrying modes - Luggage strap design enables convenient attachment to a suitcase for travel Comfort and durability - Zippers and reinforced stitching ensure durability for all travels - Back panel and shoulder straps use breathable sponge mesh padding to relieve pressure and improve ventilation for comfortable wear Capacity and organization - Main compartment is spacious enough to hold travel essentials - Front pocket is designed specifically for smaller items - Accommodates a 15.6 inch laptop and other items Expandable capacity - Expandable design provides extra space for travel or daily commuting - Easily carry everything needed for varying trips and routines Use scenarios - Business travel or airport transit: switch between backpack and briefcase for versatile use; attach to a rolling suitcase with the luggage strap for easier mobility - Daily commuting or weekend trips: expand capacity to accommodate extra clothing or gear while maintaining organized storage - Student or professional daily use: safe and convenient storage for a 15.6 inch laptop and accessories, with front pocket for smaller items and accessible organization