70% cotton TREAT ANTHLETES FOOT- Refund if no effect! This sock features titanium in the yarn. It can release ion which can remove foot odor.Titanium has better performance than silver. INFRARED RAY-Titanium negative ion can release infared ray which keeps your feet warm and dry. It also improve the metabolism and balance the body pH level. This makes your feet health and happy. SOFT AND COMFORT-The material is blend of combed cotton, polypropylene, spandex and titanium. The combed cotton is very soft and breathable. The polypropylene conducts the sweat and moisture out so that you feel comfortable all the day. NO SIDE EFFECT-Using the physical method to remove foot odor. No chemical is involved. So there will be no side effect to your health. AVOID EMBARRASSING SITUATION-Say goodbye to stinky feet! No need to worry when you have to kick off your shoes. No need to scratch a itchy foot caused by dermatophytosis. More freedom, more confidence.