You're not trippin' dude, those are really the brand new Magic Mushrooms Socks by Good Luck Socks!
Large: (7-12) Men's shoe/(9-14) Women's shoe
Machine wash, cold (30 °C / 86 °F). Do not bleach or iron the socks. To reduce damage, line dry. They will last longer if you keep them out of the tumble dryer.