COMME CA FOSSETTE size 80 pants + OLD NAVY size 80 equivalent polo shirt set. Sizes are: Comme Ca pants = 80, Old Navy polo shirt = 18-24 months (equivalent to size 80). Materials are listed on the tags. Polo shirt: 100% cotton Pants: 65% polyester, 32% cotton, 3% polyurethane. How to wear: Pants = elastic waistband, no hook; Polo shirt = typical button closure at the neckline. There is some wear and tear, but no noticeable stains or tears. Items will be shipped via postal mail. Please refer to the photos and the question section for further details. Feel free to inquire about multiple purchases or discounts.