Heat Holders Boys Captain America Slipper Socks These great Licensed Character slipper socks have been designed to keep feet warm on the coldest of days. Thick, chunky and with a massive tog rating of 2.34, Heat Holders are made from a specially developed heavy bulk yarn which has extreme thermal qualities. With long pile cushioning, these thermal slipper socks will help keep feet fully comfortable and supported. The non-slip gripper on the bottom to provide better traction on indoor wood or tiled surfaces. Slipper socks are not recommended for use in shoes or boots. These socks are machine washable at 40. They are made from 91% Acrylic, 5% Nylon, 3% Polyester, 1% Elastane.   Extra Product Details - Officially Licensed - Crew Socks - Non-Slip Grips - High Tog Rating