These are Officially Licensed Pink Floyd Pajama Pants for men. Pink Floyd was a psychedelic pop group from the 60s known for experimentation, creative, elaborate shows and concerts, and philosophical lyrics. Pink Floyd's Dark Side of the Moon was the eighth studio album. The album is among the most critically acclaimed records in history and the most commercially successful. If you are a fan of the rock band and this incredible album, you'll love these pants that feature an allover Prism design on a subtle tie-dye pattern. These pajama pants are made of an incredibly soft 92% Polyester / 8% Spandex fabric blend that is perfect for lounging around the house!