It seems ugly Christmas sweaters are no longer just a means to communicate our abundance of holiday joy (and temporary insanity). They’ve become a vehicle to say some really important things. A recent campaign from Finnish newspaper Helsingin Sanomat created a line of the jumpers to make a point about truly “ugly” issues like sexual harrassment, war and technological manipulation, while the WWF continues to use them to showcase its own environmental cause.  

Last year, the organization created the “Uncozy Sweater,” the design of which depicted the effects of climate change on our natural surroundings and wildlife. This year it continues the idea with the “Last Sweater.” Conceived out of Swiss agency Wirz, this latest piece of socially-minded knitwear calls attention to global warming--and how it may eventually eliminate our need to don such gaudy creations when winter comes around.

WWF and the agency teamed with designer Julian Zigerli on the piece, made from organic merino wool. Celebrities including Alan Cumming, “Breaking Bad” actor RJ Mite, director Marc Forster, French DJ Pedro Winter and Grizzly Bear frontman Ed Droste have helped promote the campaign by donning the sweater, which regular folks can purchase for 245 swiss francs (about $245), with all proceeds going to support WWF.

The organization has made a point of calling out what we're poised to lose--or have already lost--due to climate change. Earlier this year, its "#TooLatergram" campaign fooled viewers into thinking that locales destroyed by environmental irresponsibility were still pristeen, glorious gems of nature.