Layer it on: Roundtree & Yorke pink cashmere sweater, $99, at Dillard’s, (800) 345-5273, www.dillards.com. Armani purple cotton/cashmere sweater, $245; Loro Piana silk/cashmere lavender zip sweater, $695; both at Stanley Korshak, (214) 871-3620. Roundtree & Yorke blue acrylic cardigan, $32, at Dillard’s.