Colorful Costume Duffel Bag

I got this duffel bag in Brazil many, many years ago at a store called Costume. It’s traveled by car, plane as checked luggage, bus and it’s still in pretty good shape. No tears. Not sure what fabric this is, and even though it may look flimsy, it is very durable. I have just washed it and put pillows inside to take the pictures. Not sure how big it is or the volume. The shoulder strap does not adjust but it is removable. Let me know if you have any questions.