Hello Cindy, thanks for your message. (n__n)
1. Yes, you can buy item(s) separately, please submit ticket (with product link & request) to our
Support Center and let my teammates help you directly.
2. the design, colors & materials for both female & male costumes are just the same, but the size standards will be different. *If the body proportion is out of average range, then the costume proportion may be affected. :)
3. It is a polyester costume.