About this product: Socks from the Kotatsu-style Socks series that warm you from the feet up. By using a special material to provide thermal stimulation to the "Sanyinko" acupressure point on 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 combating air conditioning in the summer and cold feet in the winter] These socks are perfect for various situations where your feet tend to get cold, such as desk work in the office, telework, standing work, and doing housework on cold flooring. The warm material wraps around your calves and feet, making them recommended for those who feel the cold easily. [Recommended as a present or gift] They are chosen as gifts for family members, friends, and loved ones who are suffering from cold feet. For birthdays, Mother's Day, Respect for the Aged Day, Christmas... and of course, as a reward for yourself. Give the warmth of "Just Like a Kotatsu" to that special someone, or to yourself. ☆When washing, please use a laundry net and wash with a neutral detergent. Also, the materials used are excellent at retaining heat, but they are prone to pilling due to friction from wearing and washing. ☆In that case, please use a pill remover to take care of them. ☆Size: 23-25cm (for women) ☆Material composition: Acrylic, wool, other ☆Description [Simply, warm.] With a unique knitting method, these socks warm the Sanyinko point on the ankle, which protects against cold, and keep your toes warm. Furthermore, by using Okamoto's uniquely developed special heat-retaining and heat-generating material, we have created socks that are warmer than ever before. ☆The "necks" of the body, such as the ankles, wrists, and neck, are points where blood flows intensively. ☆When these points get cold, cold blood flows through the body, leading to overall body chill. ☆The secret to protecting your body from the cold is in the "necks." For those who... ◎Want to relax ◎Have cold feet while sleeping ◎Find cold flooring difficult