Hello All- I'm Nate at Fitsok...I wanted to drop in say hello and let everyone know how pumped we are about this collaboration with Massdrop. Our design team along with Massdrop worked hard to find the perfect sock for all outdoor activities. We blended natural wool & nylon with innovated knitting techniques and we're proud of the result. We hope you enjoy these socks as much as we do! Thanks for all the support and happy running, hiking, walking and riding!