BNWT Lily Silk Sweetheart Neck Ribbed Silk Knit Top. This finely knitted spun silk of this bustier-style tee was selected for its comfort and softness; a small portion of nylon keeps it stretchy and inclusive. Designed for a slim fit and knit style, the cap-sleeved top has a flattering sweetheart neckline. 85% machine-washable spun silk + 15% nylon. Navy blue. Size L. Runs small.