This sock pack is a tribute to two naturally-occurring holographic effects. The first pair celebrates nature's lightshow, the Aurora Borealis. The second pair glimmers like a oil mirage, complete with colorful, prismatic swirls. Printed using our signature 360 DTG process (no dye sublimation) that prints vibrant, full color artwork directly onto these 200 needle knit polyester blend socks. They have a half terry cushioned bottom for extra support.  One Size Fits Most: Men's US size 3.5 to 12 Women's US size 5 to 14 UK size 4 to 11.5 EU size 36 to 46. Item cannot be shipped to P.O. Boxes