Ladies Long Heat Holders thermal socks Light pink 5-9 us acrylic blend All the warmth of our original Heat Holders thermal socks with an extra-long leg and added elastication around the feet and ankles to stop them from falling down. Great with wellies, Heat Holders long leg socks give you intense comfort and warmth from your toes right up to your knees. Composition : 91% Acrylic, 5% Nylon, 3% Polyester, 1% Elastane