Star Trek: TNG (Season 5, Episode 18) Where did this uniform come from?

In some episodes Picard had a red (command colour) jacket over a grey shirt as an alternative to the standard uniform. The picture you gave is just him without the jacket. Here's a pic of him wearing the full outfit that you'll probably recognise: http://www.miamihost.net/ims/u/mrjsteel/Pictures/picards_jacket.jpg