Sigvaris Sea Island Cotton Women's Knee High 20-30 mmHgStyle Sea Island Cotton (Formerly 220 Sea Island Cotton) socks are made with the worlds rarest cotton, ensuring a luxurious feel that is as soft as cashmere. FEATURES Knitted with the worlds rarest cotton for a soft, luxurious feel Ideal for sensitive skin Double covered inlay yarns provide comfort and allow product to easily glide on and off FIRM COMPRESSION (20 30 MMHG) Heavily, fatigued, aching legs Mild edema in lower limbs Mild varicose veins