Hal Jordan in Flash and Green Lantern: The Brave and the Bold #3

Hal and Barry go on a double date camping trip with Jay and Alan. Hal is the only one sleeping in briefs when they're rudely awakened. I know Barry is in PJ's but I can totally see briefs under them too. 

Bonus
While I do think Barry is a total briefs guy too, it's adorable the contrast between his and his husband's PJ's