Patagonia Womens Capilene 1 Base Layer Silkweight Shirt Purple Size XS. Patagonia women's Capilene 1 silkweight shirt. Scoop neck. Short sleeves. Lightweight polyester fabric. Purple, almost pink with blue trim along neckline. Size XS. Measured laying flat: 15.5" from armpit to armpit. Measures 22.5" long from top to hem.