Celebrities including Chris Rock, Amy Schumer and Mark Ruffalo are appearing naked in new ads that bring attention to laws that require voters in 16 states, including Pennsylvania, to insert their mail-in ballot into two separate envelopes in order to be counted.

While the celebrities are in the nude, viewers only see the men from mid-chest and up and the women do not have their breasts exposed.

RepresentUs, the creator of the ad, says, “the rule risks the rejection of hundreds of thousands of mail-in votes, which could significantly impact US election results.”