Three Switches for Warmth from Toe to Tip and a Comfortable Sleep on Cold Winter Nights Three Secrets to the Sleep Switch 1. Turn on the Sleep Switch by Warming Your Soles: Warm the soles of your feet, where key points and blood vessels are concentrated. 2. Turn on the Sleep Switch by Releasing Your Toes: Open-toe design prevents heat and sweat from building up. 3. Turn on the Sleep Switch by Relaxing: Warm the points on your heels with heat-generating material. 2 Sets for ¥3,199 Get ¥100 off when you buy with other products → #Yakoshop