Gradual Compression (Tabio Original Knitting Method with a Patent in Japan): Foot Care, Make Your Leg Less Fatigue; Ankle 21hPa ~ Calf 16hPa ~ Thigh 11hPaThese are the perfect items for you who are busy every day. The gradual compression on our Nighttime Compression Thigh-High Socks is designed to optimize the level of compression from your ankle all the way past the knee to ensure a perfect fit. It also features nylon thread with moisture desorption qualities, freeing you from feeling stuffy overnight as you sleep.Made in JapanMaterial: Nylon 90%, Polyurethane 10%Women's Seasonal Collection* The actual colors may look different from the colors in the pictures depending on your monitor, browser, the color of light, Illuminance and view angle.