Sock It To Me writes, "Sasquatch, bigfoot, whatever you call them might seem scary, but this monster is just out for a night walk in the woods on these glow-in-the-dark socks." 53% COTTON, 45% POLYESTER, 2% ELASTANE EXCLUSIVE OF ELASTIC. Our combed cotton threads are certified by OEKO-TEX® Standard 100, which means we leave out harmful chemicals to keep your skin safe and happy. Approximately fits men's shoe size 7-13, fits women's shoe size 8.5-14.5.