Justin Theroux is getting a lot of attention lately for some of his scenes on HBO’s series “The Leftovers,” and no, it’s not his stellar performance that is getting noticed (which is great, by the way), but for what he is packing below the belt.

So while appearing on “Conan” Wednesday (Sept. 3) the host couldn’t resist bringing up Theroux’s sexy, swinging jogging scenes that have all the ladies in his office swooning.

Theroux admitted he wasn’t sure what the “classy way” to answer the question was, but did reveal he had to wear not one, but two pairs of underwear to camouflage things underneath his signature sweatpants.

Check out the clip above to see Conan talk all things Theroux below the belt. The Season 1 finale of “The Leftovers” airs Sunday, Sept. 7 at 10 p.m. ET/PT on HBO.