The Hike Full Cushion Crew socks, previously known as PhD® Outdoor, are designed with cushioning throughout the entire sock to effectively provide warmth and protection. These eco-friendly Merino wool socks are responsibly sourced and ZQ-certified, utilizing our advanced sock technology such as Indestructawool™ for increased durability, 4 Degree™ Elite Fit System for precise and performance-oriented fit, and Virtually Seamless™ toe for ultimate in-shoe/boot comfort. Our hike line has been upgraded with improved mesh zones for better breathability and a new ply structure that reduces pilling while enhancing the overall feel and comfort. And now, these top-performing and well-fitting hiking socks are made with recycled nylon, making them more sustainable than ever before. It's a choice you can confidently make for both comfort and the environment.