Calvin Klein’s underwear line has been having a moment thanks to its recent #mycalvins Instagram campaign, and now you can get your very own pair of Calvins with Shopbop’s Calvin Klein Underwear sale. The retailer is offering 25% off all of the brand’s undergarment styles, effective when you go to check out. The promotion ends on January 1st so what are you waiting for? Shop the underwear sale on Shopbop.com.