You've seen the T shirts that will show handprints generated by body heat.
Same thing for bedding.-- theircompetitor, Feb 22 2004 hb style bedding, windows http://www.loop.ph [theircompetitor, May 12 2006] Flirting with transparency http://localuknews....s-dress-turns-clearReally? [theircompetitor, Feb 06 2013] Spreadsheets https://itunes.appl...d./id673680985?mt=8 [theircompetitor, Dec 25 2013] Smart fabric -- Intimacy https://www.studior...oject/intimacy-2-0/ [theircompetitor, Mar 16 2015] Actually, I've never seen those shirts. I don't like it, though. People would see big, human-shaped blotches and think 'poor bowel control.'-- motive power, Feb 22 2004 With Tee shirts people could see the prints. What do you plan to do with the bed stains?-- nomadic_wonderer, Feb 22 2004 I'm leaving it for the imagination of the user-- theircompetitor, Feb 22 2004 See cool loop.ph link-- theircompetitor, May 12 2006 Look at the last link [Spreadsheets].-- theircompetitor, Dec 25 2013 If the fabric fibres could change shape with temperature as well, they could perhaps "fluff up" the duvet when cold.-- Ling, Dec 25 2013 random, halfbakery