Our bone-chilling Fluorescent Green Knee-High X-Ray Socks are the perfect sports socks for Halloween. An all-black background is adorned with fluorescent green leg bones for a smashing skeleton sock that's uniquely creepy. These socks are appropriate for both athletic and casual wear, with an over-the-calf style made from a lightweight blend of acrylic, nylon, polyester and spandex. They also feature a flat-knit construction for extra comfort, plus a reasonable thickness for softness and support. Our made in the USA sports skeleton socks fit ladies' shoe sizes 5-10 or men's shoe sizes 4.5-8.5. .