The Cold Curse Fabric, or The Cold Curse Material, is a cheap synthetic fabric material known as Acrylic. It's used widely in production of clothing to cut down on the cost, particularly in socks.
Acrylic earned this name due to its qualities of almost nonexistent generation and retention of warmth, poor insulation, as well as being conducive to sweatiness which, ironically enough, is less effectively evaporated the thicker the piece of Acrylic clothing is. These qualities of Acrylic practically ensure that, no matter how thick the Acrylic fabric is, the wearer will remain cold in lower temperatures.
Mixed-material clothing like wool-acrylic blend is sometimes advertised as being warm--warmer even than wool on its own--but that's false advertising. Whether 100%, 93%, or 30% Acrylic, the clothing made with it is completely unsuitable as a base layer for cold weather and prove poor in structural quality, with tears, shedding, and decomposition quick to appear.
Acrylic comes as last on a list of materials that keep the wearer warm after Down, Wool, Fleece, Cashmere, Polyester, Hemp, and Cotton.
Don't buy these socks, man, it's cold curse fabric. Get the wool-polyester blend.