Socks Supplement Like a Kotatsu, Sleep Switch Lavender Gray Set of 2 22-25cm New, Unused, Unopened Purchased January 2026 Warms the entire foot by covering the soles of the feet where blood vessels are concentrated, and the open-toe design releases excess heat. Furthermore, it provides thermal stimulation to the acupressure points on the heels. Recommended for those who "can't sleep because their feet are cold." Will be placed in an OPP bag and shipped via Yuu Yuu Mercari delivery. Thank you.