Vintage Vanity Fair slip in pale ivory nylon. 1970s, I believe. Has a pretty lace bust which is echoed at the bottom hem, adjustable straps, and is machine washable. Label reads: Vanity Fair, size 34, dupont nylon. 
Excellent vintage condition. There is a tiny dark dot on the back and not far from it a exceptional pale pink mark, so faded it would not photograph well.  

Measurements when lying flat. Doubled at bust, and waist
Armpit to armpit across bust: 37"
Waist: 30"
Hips: up to about 42"
Shoulder to bottom hem: adjustable but about 42"
Please note: These are vintage, preworn and/or preloved items. I do my best to list any issues, but signs of wear should be expected. Please feel free to convo me with any questions. I'm truly happy to help in any way possible and I'm always up for a chat. Any accessories shown, including crinolines, are for display only, not included unless otherwise stated