Size Chart Celebrate MEB with these Ultralight Run socks. They are built to be 30% thinner than CEP's Run Socks 2.0, and are made with polypropylene fibers that work to wick moisture and provide a cooling effect. A close-fit and breathable fabric give comfort and blister prevention. Features: - 20-30 mmHg from ankle to calf, 18 mmHg consistent compression over the calf - Optimum recovery, performance, and thermal balance - Maximum stability for muscles and joints - Padded zones to relieve pressure where it's needed most - Close-fitting foot section helps prevent blisters - Prevent legs and feet from swelling - Antibacterial, odor-reducing properties - 60% Nylon (Polyamide), 20% Elastane, 15% Polypropylene