SockGuy joined forces with the philanthropists and bike engineers at World Bicycle Relief to create its SGX3 World Bicycle Relief 2015 Socks, and it gives a portion of profits from sales of the socks to the organization. The World Bicycle Relief donates rugged steel commuter bikes, known as Buffalo Bikes, to communities in need throughout Africa with the overall goal of improving access to jobs and growing local economies. The organization's mission is something we can all get behind, and as you support it, your feet will stay dry and comfortable courtesy of the SGX template on which the socks were designed. Made with a blend of polypropylene, nylon, and spandex, SGX socks have a more contoured fit than some of SockGuy's other models, with a compressive cuff and arch to promote healthy circulation through the muscles of your feet as you ride. They're breathable and lightweight, perfect for hot summer rides or long races when you're sweating before you've even started riding and the last thing you want to think about is high cuffs and thick cushioning.