NWT- Old Navy Fitted One-Shoulder Tie Rib-Knit Dress Material is the traditional Old Navy ribbed dress, however this dresses fabric feels a little thicker, almost as if it was doubled lined. Fabric is not see through. Size/Fit: XL, true to size. Length hits at a midi to maxi length. The straps on the shoulder are adjustable, makes it perfect for those with a bigger chest. There are 2 slits on both sides of the dress. Features a build-in shelf bra, still room for a strapless bra if desired.