Limited edition design for 25 years is now available! These are the sock type from the "Marude Kotatsu" (Like a Kotatsu) series, which warms your body from your feet with patented technology. By using a special material to provide thermal stimulation to the "San'inkō" acupressure point in the ankle, you'll feel warm from the inside out. You'll be enveloped in warmth, just like a kotatsu. These are recommended for yourself, as well as for gifts. Please consider this item as non-discountable.