Tourmaline Design - The bottom of socks has Tourmaline design which can self-heating to warm and ease your feet in cold weather. It provides stability and safety for everyday use at home or hos-pital stay as well as enhanced performance for exercise such as trampoline, yoga, pilates, or barre. Adaptive Infrared Heat Technology Self-Heating and Magnetic Brace Design Stimulates knee acupressure points. Automatic Closing Function - Hat tratmnts, the kne massager knee pads are built in hat pds with hat that work well for soothing stiff joints and tired muscles and nhncs bld circulatin, provids nutrints to joints and muscles. The hating pads with auto shut off function nsur saf use. Soft & Smooth Velvet Fabric - This Knee and Leg massager use soft and smooth fabric materials for close a comfortable way, has a long life. Our socks provide superior fit thanks to its h elasticity cotton material. They are stretchy, soft and breathable. Stay Clean And Covered - Protect your skin from dirt and coldness with our closed-toe fully-covered design, keeping the entire surface area of your feet free from exposure. Medium thickness is suitable for all seasons including summer and winter. You can use them as a little light slipper for home leisure. You can also use them as thick sock when you put on shoes and go out. Excellent Gift Choice - Compact and portable design,convenient to use the knee braces at home or office. An ideal gift for mom, dad, men, women, parents or friends for birthday,thanksgiving,christmas gift.