Postalco’s Travel Bag, made with linen/cotton and leather, is lightweight yet strong enough to carry a full load of books. It’s large enough to carry A3 sized documents, has an inner zipped pocket with pen slot, zippered top, and should fit under your airplane seat. Postalco’s products feature an amazing attention to detail and I can’t imagine a better product to carry your fine papers and books.
I originally featured their Travel Wallet and have had the opportunity to see their product after extensive usage. They get better with use.