Take your style to the next dimension and support space exploration with our stellar collection of black, navy, and maroon ankle socks. And we have to say; the comfort here is out of this world. • Each box supports The Planetary Society to fund innovative space exploration technologies. • Certified Organic (GOTS), Certified Fairtrade (Fairtrade International), and Certified Vegan (Vegan.org) • Knit with combed cotton yarn for a smooth feel, greater durability, and reduced pilling. Terry padding on the footbed for extra comfort. • Small fits women’s US shoe sizes 5-9, men's US shoe sizes 4-8, and EU shoe sizes 36-40. • Medium fits women’s US shoe sizes 9.5-14, men's US shoe sizes 8.5-13, and EU shoe sizes 41-47. • Best for: planetariums and observatories, science centers, museum gift shops, Fairtrade stores, and retailers looking for sustainable apparel. • They’re a thoughtful gift that gives back for science lovers and astronomers, and are the perfect accessory for sustainable consumers or anyone who loves fun socks.