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.
Machine Wash Warm, Wash Inside Out. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.