I've worn it a few times, but there are no noticeable stains. It's made of polyester and is very thin, as you can see from the pictures, so I think it would be fine as an inner layer. Above all, it's a cool top. I think there was a string at the waist, but I'm sorry, it's not there. I cannot accept returns due to a difference in image or size, etc., at the buyer's convenience, so please look at the images carefully and understand before purchasing. I have many other items for sale. Please take a look if you'd like. Color: Red系 (Red-based) Season: Spring/Summer Stains, tears, odors, etc.: None