This Ruben cardigan by Sezane is made of 100% cotton. It buttons up the front and has an extra button on the internal side tag in case you need it. It's in pristine condition with no flaws and looks to me like it's never been worn. I don't know for sure that it's NWOT, so am not listing it that way. I bought this cardigan as a lot of 5 size XS Sezane sweaters that I'm listing. Please feel free to bundle 2 or more for 20% off. Please review the below measurements to ensure it's a good fit for you. They were taken on the front with the sweater buttoned up and laid flat. Note that, as a knit sweater, the fabric is slightly stretchy, so can expand to accommodate larger dimensions than the ones shown below. Pit - Pit: 18" Pit - Bottom Hem: 13: Shoulder Seam - Bottom Hem: 20" Sleeve: 23" Please let me know if you have any questions.