A little Christmas surprise: In every product we send out in the run-up to Christmas, you will find a beautiful Christmas card. We wish you a unique and merry Christmas! Multiple combinations Socks are available in red, white and black. We also offer non-matching socks: Black + Red, Black + White, Red + White. One size fits feet size 37-44, unisex socks for easy matching with everyday wear. Foot Warming The foot warmth product is a high-tech product made of tourmaline as the core, which is combined with nanobiological functional materials. The spots on the socks are made of tourmaline, which resonates with the magnetic field of the human body. And the body's own energy can continuously release heat energy, negative ions, far infrared create deep thermal effects. So you are not afraid of the cold in the hard snow. Foot CareTraditional Chinese medicine believes that when people grow old, their feet fade first. All organs of the human body have the corresponding reflection area on the foot, and massaging the corresponding reflection area can relieve the pain of the corresponding organ. Put on our socks, tourmaline massage points covering all acupuncture points on the feet will take care of your health. Exquisite Sewing Fine sock mouth and sock toe processing, high sewing strength and high elasticity. When pulling, you can feel the soft texture of pure cotton without tightness. Blade scratch test: The blade ran smoothly over the fabric without snagging the thread. Provides you with maximum comfort. Multi-purpose Stopper socks for a secure step during a workout or activity. Ideal for barre, pilates, yoga, ballet, trampolines, lab or slippery floors. In cold winter, it can give you continuous heat energy. Use when tired to improve human microcirculation, speed up metabolism and relieve fatigue quickly. Specification: Material: cotton Sizes: 37~44 Universal Features: Stimulates foot points with high quality natural hotspots for massage effect, magnets for warmth and heating, ideal for skiing, hiking, hunting, ice fishing and other indoor/outdoor activities in winter. Weight: 40g/pair Colour: Black