PhD® represents the highest degree of performance. It means you can expect the latest technology, fit systems and our all-around mountain smarts. From trail-proven hiking socks to run socks made for the long haul, PhD® socks help you do more of what you love, in extraordinary comfort.
That’s why we do what we do: make gear that gets you from Ketchum to Kathmandu and feels good all along the way. Our mission is to create smarter, more capable products that allow you to do more of what you love. We start by placing the world’s finest Merino where it matters most, next to your skin, then design from there. We focus on the details so you can focus on what really matters.