Amazon.com: MATEIN Carry on Backpack, 40L Flight Approved 。Brand new, never used, and in flawless condition — this versatile travel backpack delivers a smart, organized solution perfect for air travel, daily commuting, or weekend adventures. The design is durable, lightweight, and built for comfort. ⭐️ Features Style: Casual daypack and carry-on luggage Fit: Ergonomic shoulder straps, lightweight build Fabric: Durable polyester, waterproof construction Perfect for flights as a personal item, work commutes, weekend trips, and daily use ? Condition: Brand New ? Bundle & Save ✨ Smoke-free, pet-free home. B0D99WN3D7