Sigvaris Cotton Comfort Compression Socks, Calf-High, Closed Toe, with Grip-Top, 20 to 30 mmHg, XL, Long, Black The high-stretch Compression Socks knit construction in combination with double-covered yarns provides great elasticity and easy donning and removal. The PFS system provides a custom-like fit, superior comfort, and application of accurate compression levels, resulting in patient compliance and medical effectiveness. 100% Cotton against the skin is ideal for people with skin allergies or sensitive skin. Integrated pressure release zone with added length and reduced compression in foot area for improved comfort. Contemporary ribbed design. Breathable and durable. Classic ribbed look. Recommended for: Long hours of standing or sitting (health care professionals, cashiers, and office workers), swelling, tired, heavy, aching legs, sensitive skin, hyperhidrosis (sweating) and mild lymphedema after decongestant therapy, post-sclerotherapy treatment and long distance travel. Material: 50% Nylon, 25% spandex and 25% supima cotton. Latex-free.