Japan Dr. Scholl MediOTTO Sleep and Slim Long Socks is a soft-cotton and three-dimensional cutting curve (open-toe breathable material) stockings with innovative slimming concept (a pressure system) which was tested by Nagoya University in Japan. It is comfortable enough to relieve your leg from swelling and return to its perfect shape during night time!The innovative pressure system of this product gently yet effectively applies graduated compression to improve blood and lymph circulation, which helps soothing tired aching legs, and reducing swelling to slim your legs while you sleep. Graduated compression provides maximum pressure from the ankle, gradually move up along the leg to the knee (Ankle 21hPa, Calf 16hPa, Thigh 11hPa). It is also ideal for people who need to stand or sit for long hours (e.g. long-haul flight).Wake up to lighter, slimmer legs! Size: M Size height about 150 - 160cm, non-refundable/exchangeable product.