No boring red fire engines for these socks... or for the kids wearing them! Boys and Girls Happy Socks Fire Truck Cotton Socks are creative Swedish designs that are bright and fun, with fire truck motifs in a whole range of sizzling hot shades. Happy Socks Fire Truck Cotton Socks are made using a quality organic cotton rich blend that make them silky-soft, light and comfortable. With mixed colour contrast toes, cuffs and heels to add even more clashes, these are seriously wild and crazy kids’ socks.