Genuine Ralph Lauren(bought in Korea, department store). The body part has extra fabric for heat(not for sleeves). The size is S but it fits XS-slim S. Good condition except for a tiny hole on the right sleeve(hard to notice,check photo). Cotton 80% Polyester 20% New to poshmark? Use signup code ALOHASWEET for $10 off Make a bundle to get a discount and to save shipping costs.