The Thinnest Condom in the World: Polyurethane 0.01 The thinnest condom in the world is the polyurethane 0.01 condom, with a thickness of just 0.01 millimeters—thinner than a human hair. This ultra-thin design offers a sensation that’s as close to skin-on-skin as possible, delivering maximum sensitivity without compromising safety. Developed using advanced Japanese and Chinese technology, only manufacturers in Japan …