21-26 mmHg COMPRESSION: Tested with leading Swiss MST IV Technology, our technical socks increase oxygen flow and blood circulation. This aides muscle recovery and increases your performance especially in warm weather when legs may swell more BOOSTED PERFORMANCE: Sweat-wicking and breathable to keep your feet cool and dry even in hot conditions. Reduces soreness and swelling. Tight fit – measure around calves before ordering. Watch our video to learn how to put them on MADE IN EUROPE: Our running compression socks are designed with endurance athletes for the highest quality and performance. Fairly produced in Portugal and ideal for high-performance sports like marathons and triathlons PREMIUM MATERIALS: Made from 56% Polyamide (Recycled), 39% Polyamide, 5% Elastane. OEKO-TEX standard 100 certified. Free from harmful substances. Machine washable at max. 40°C. Do not tumble dry ANTI-HOLE GUARANTEE: Got a hole in your socks within the first year after purchase? We will send you a replacement for free. If you have any questions, our customer service is always happy to help you