Kylie Jenner: My Body Sells ... Leggings Too!!!

Kylie Jenner's body is like a Times Square billboard .... slap something on it and everyone will notice.

Dead Studios is the latest beneficiary. The company sent Kylie a bunch of free swag, including a pair of their Dead Sports leggings. Brand director Sam Moore tells TMZ, sales went through the roof in a matter of hours after Kylie posted photos showcasing the tights.

Moore says the company made a month's worth of profits in 24 hours. The craziest part, they say they don't have an endorsement deal with Kylie.

Safe to say Kylie will be getting more free swag.