Hello all! I'd like help getting more information about this dress. There are no tags inside, but there is "MURLEN" engraved on the zipper. There is some light boning in the body. There are some interesting elastic sewn flat into the sleeves. What would be the purpose of these? I cannot tell what the fabric is and I would like to know what would be the best way to care for this dress. I like this dress a lot and I'm afraid to do anything. Should this be dry-cleaned? Thank you in advance!