Cosyfeet XR Warm Rib Knee Highs This is the warmest hosiery in our range. It's knitted from a special type of nylon called Supplex which allows skin to breathe whilst keeping legs warm. These knee-highs feature our exclusive Softhold top which means they're designed to stay in place comfortably, without restricting circulation. The Extra Roomy fitting provides greater comfort for larger or swollen legs & ankles. Softhold top keeps them securely in place without pinching or digging in They won't mark skin or restrict circulation Ribbed knit for added warmth Contains Lycra 80 denier appearance Extra Roomy fitting offers a generous fit for swollen feet & legs 3 pair pack Fibre Content: 60% Supplex, 4% Lycra