Will Stretch It Super Hero Red and White Knee Socks give your legs super human powers? A white lightning bolt stands out on both sides of bright red extra stretchy knee high socks. Two white stripes at the top. Stretch It Super Hero Red and White Knee Socks are great for muscular, athletic, and/or larger calves. Sock It To Me's Wide Calf styles comfortably stretch up to 21 inches around the calf and 18 inches at the top elastic.