Smartwool Diamond Jim Earth/Oatmeal Sock at Robert Frost Fine Footwear and frostshoes.com. Diamond Jim is a mid calf sock made for leisure activities. With a dressy diamond design, this sock can go from the office to the streets and offers incredible comfort, awesome style and even better support throughout your day. SmartWool is itch-free, moisture management for all day comfort. Diamond Jim is stylish and ultra comfy. Smartwool is washer and dryer friendly. Smartwool Diamond Jim Earth/Oatmeal men's sock is comprised of 90% Wool 8% Nylon 2% Elastic at Robert Frost Fine Footwear and frostshoes.com.