How fashionable is an M&S cashmere onesie?
9 November 2013 Last updated at 17:28 GMT
High Street retailer Marks and Spencer unveiled a cashmere onesie as part of their Christmas collection.
But how fashionable is it - and who would buy it?
The Today programme's Justin Webb spoke to TV fashion show presenter Trinny Woodall and Catherine Fuller from the London College of Fashion, who used to design luxury sleepwear.