About this product: "Marude Kotatsu" series socks that warm your body from the feet. By using a special material to provide thermal stimulation to the "Sanyoin" acupressure point in the ankle, you'll feel warm from the inside out. You'll be enveloped in warmth, just like a kotatsu (heated table). *Box not included. [For summer air conditioning and winter cold protection] Great for situations where your feet tend to get cold, such as desk work in the office, telework, standing work, and housework on cold flooring. Warm material wraps from the calves to the toes, making it recommended for those who feel the cold easily. [Recommended as a present or gift] Chosen as a gift for family, friends, and loved ones who are suffering from coldness. For birthdays, Mother's Day, Respect for the Aged Day, Christmas... and of course, as a reward for yourself. Give the warmth of "Marude Kotatsu" to that special someone, or to yourself. ☆When washing, use a laundry net and wash with a neutral detergent. Also, the materials used are excellent in heat retention, but they tend to pill due to friction from wearing and washing. ☆In that case, please use a pilling remover to care for them. ☆Size: 23~25cm (for women) ☆Material composition: Acrylic, wool, other ☆Description [Above all, warm.] With a unique knitting method, it warms the Sanyoin acupressure point, which protects against coldness, and keeps your toes warm. Furthermore, by using Okamoto's uniquely developed special heat-retaining and heat-generating material, we have achieved warmer socks than ever before. ☆The "necks" such as the ankles, wrists, and neck are points where blood flows intensively. ☆When these points get cold, cold blood flows through the body, causing the whole body to feel cold. ☆The secret to protecting your body from coldness lies in the "necks." For those who... ◎Want to relax ◎Have cold feet while sleeping ◎Find cold flooring difficult