CEP Women's Trail Merino Mid-Cut Socks fits below the calf for a crew length height. Tough, durable compressive yarns increase blood circulation, reducing foot and ankle swelling. Trail Merino is designed to enhance your trail running experience and performance. Expect a custom-like fit that eliminates friction, preventing blisters and rubbing. Padded cushioning optimizes comfort and prevents hot spots. 4-inch cuff height provides true ankle stability, preventing shin splint pain and injury. Medical grade 15-20 mmHg compression hugs your foot and arch while graduated compression supports your shin and ankle, increasing blood circulation by up to 40%. The best outdoor sock for maximizing comfort, endurance, and pain relief. CEP’s finest merino wool blend is lightweight and breathable, keeping your skin dry and comfortable. Anatomical foot padding hug your feet for a wrinkle-free, athletic fit. CEP Trail Merino is the best trail running sock, period.