I've worn this a few times, and it's in good condition. There's no tag with the material or washing instructions, so the details are unknown, but it seems to be a polyester-like material that's very light and stretchy. It has good elasticity. There are two hook-and-eye closures. There are individual differences in the perceived wear and tear of used items. Please check the photos and consider purchasing only if you understand the nature of buying from flea market sites and online stores. *Please note that I may change the shipping method from Rakuraku Mercari Bin to Yuuyu Mercari Bin, or vice versa.