【20-30 mmHg Graduated Compression】Firm compression is strongest at the ankle and gradually reduces up the leg to support circulation, support venous return, prevent blood clots, help relieve tired, muscle soreness, heavy legs. Lycra fabric offers excellent stretch, making it both comfortable and form-fitting without looking bulky. 【Size Tips】Choose your size by calf circumference first for a better fit. Size down only if you prefer tighter compression. S/M fits calf 11-15 inches, UK Size 3-8; L/XL fits calf 13.8-17.7 inches, UK Size 9-15. 【Cooling Breathable, All-Day Comfort】Our socks are made from fabrics and designed specifically for summer. 80% Polyamide + 20% Lycra Elastan-Extremely breathable and lightweight, ideal for long shifts, flying and physical activities, offering all-day comfort. 【Friction & Muscle Support】The seamless toe design helps to reduce friction on the toes. The elastic, non-slip cuff keeps these knee high socks securely in place without slipping, offering muscle support for your calves and legs, and helping to alleviate fatigue, cramps, and heaviness. 【Suitable For Various Occasions】The compression socks provide moderate to light compression and are ideal for prolonged physical activity and everyday wear. Particularly suitable for nursing shifts, long flights, air travel, office work, teaching, walking, running, cycling, and other active routines. A versatile choice for everyday circulation support and post-activity comfort.