It's a bag from Nature Bag - I bought it a couple of years ago when I was in Laos. I sometimes use it as yarn bag when I'm abroad, because it's flexible and lightweight. It's from made of the natural, strong kudzu fibre which is traditionally used in Laos (and other countries) for making bags and baskets. Kudzu (also known as Japanese arrowroot, as Wikipedia kindly informed me) is a climbing vine that is native to Laos and many other parts of Asia.