J. Crew Silk Blend Fine Ribbed Knit Puff Sleeve Sweater in Black. This J. Crew sweater is made with a comfy ribbed fabric with TENCEL™, a fiber produced from wood pulp sourced from sustainably managed and certified forests — meaning they aren't ancient or endangered. Gently worn, no imperfections in excellent condition. • TENCEL™ lyocell/acrylic/silk. • Machine wash. • Fitted. • Body length: 22 1/2". • Sleeve length: 30 1/2". • Hits at hip.