These are Officially Licensed Pink Floyd Tie Dye Pajama Pants. Pink Floyd was a psychedelic pop group from the 60's that formed in London by Syd Barrett, Nick Mason, Roger Waters, and Richard Wright. Known for experimentation, creative and elaborate shows, and philosophical lyrics. Pink Floyd's Dark Side of the Moon was the eighth studio album and had themes within the songs that focused on conflict, greed, and mental illness that had hit close to home as the band had success and was dealing with many of the problems that success brings. The album is among the most critically acclaimed records in history and the most commercially successful band. If you are a fan of the band and this incredible album, you can grab these super comfy PJ pants. Each lounge pant is made of soft cotton fabric.