EXCELLENT CUSTOMER SUPPORT: We want our customers to be happy - If you have any questions about this product, do not hesitate to contact us. Our team is always ready to help you. PREMIUM MATERIALS: Made from 54% Prolen, 38% Polyamide, 8% Elastane. OEKO-TEX standard 100 certified and free from harmful substances. Machine wash at max. 40°C. Do not tumble dry. MADE IN EUROPE: Our compression sleeves are designed with Danish Olympic Runner Stina Troest who tests our products to ensure high quality standards. The sleeves are fairly produced in Portugal. BOOSTED PERFORMANCE: These sweat-wicking calf sleeves reduce sore and swollen legs for all high-performance sports including running, marathons, triathlon and fitness. The sleeves have a tight fit. 21-26 mmHg COMPRESSION: Tested with leading Swiss MST IV Technology, our technical sleeves increase oxygen flow and blood circulation. This aides muscle recovery and increases your performance.