Joseph A. Qu'est-ce Que C'est Silk? Black Turtleneck Sweater Size L Joseph A. Qu'est-ce Que C'est Silk? turtleneck sweater. Size large in classic black. Pre-owned with no visible wear. Ribbed turtleneck, cuffs, and hem. Soft knit material with a silk-like feel. Lightweight and versatile for layering.