• U.S. shoe size: women’s 8.5–14.5, men's 7–13
• Wide calf fits up to 21-inch circumference
• 61% cotton, 36% polyester, 3% elastane
• Threads are OEKO-TEX certified, meaning no harmful chemicals
• Made in Korea

When lightning bugs swarm and flash in unison, it's a beautiful sight. These fun glow-in-the-dark socks feature fireflies in jars and flying through the air along with stars in the night sky. Both bugs and stars shine when you shut off the light (or wear them under a black light).