Despite the claim to be machine washable, there was some shrinking and a LOT of wrinkling. My husband mistakenly left a pillow case out before washing and not only is the shrinkage visible, the pretty sheen and softness that the fabric HAD is completely gone, leaving a dingy appearance and noticeably rougher texture. As a test we decided to wash another sheet set we'd bought from OS the same way, the same temperature water with the same detergent and it came out with no problems at all. As others have mentioned the attached flat sheet feature is strange and there is a lot of bunching with this. For the price and problems I'd love to send it back. I don't know if they'll take it now that we've washed and slept in it but it's worth a shot!