Comfortable Compression Therapy The Sigvaris Essential 230 Series, Cool and Comfortable Cotton, is ideal for those who appreciate comfort in a medically therapeutic compression stocking. Cool cotton stockings are medically effective for patients who suffer from, or are at risk of venous disease. Features: Cool Cotton is available in two different compression levels. Yarn percentages on this product are: 50% Nylon, 25% Lycra spandex, 25% Cotton, cotton layer faces inside of the stocking. Natural Cool Cotton is a combination of the finest Egyptian cotton and multi-filament yarns. This breathable material makes these stockings cool and comfortable to wear. Durable Double-covered yarns also insure durability and a long product life. This makes the Cool Cotton especially suitable for everyday and leisure wear. Selection Cool Cotton stockings are available for men and women in a wide variety of sizes, including average and full circumference, short and long lengths.