Also known as: 睡衣挑戰, パジャマチャレンジ, pajamachallenge, pajamaschallenge, ihidemypower, tshirtchallenge, Tシャツチャレンジ
A Meme consisting of two side-by-side images, one where a loose Pajamas shirt is worn, and the other where the pajama shirt is pulled back, tightening around the body.