It’s a bird! It’s a plane! No, it’s a pair of Heat Holders DC Comics Superman Slipper Socks! These Superman costume styled slipper socks have the twin super powers of built-in thermal heat retention and slip resistance – not because they come from Krypton, but because Heat Holders are the Ultimate Thermal clothing brand! Heat Holders DC Comics Superman Slipper Socks have all the warming qualities of classic Heat Holders thermal sock soft brushed linings, but with added anti-slip grip sole treads to keep you safe while relaxing at home to stop you going flying without a cape!