Stretchy ribbed fabric. OPEN TO ALL OFFERS, PLEASE USE OFFER BUTTON! (Please give me 48-72 hours to respond to questions.) All ordered placed will shipped out on TUESDAYS, THURSDAYS, and SATURDAYS ONLY. Orders placed after 11 AM CST on shipping days will be shipped the following shipping day. All items are cleaned before shipping, but please be aware they’re coming from a pet friendly SMOKE FREE home!