This New Era 59Fifty Fitted Cap is by Upper Playground. Its called the Camo All Over Walrus and is actually a pretty limited product. Upper Playground only produced a total of 144 hats in this style. You can purchase this cap at BecomeFitted.com for about 40 bucks. Currently sizes 7, 7 1/8, 7 3/4, 7 7/8, and 8 are sold out.
Just clicked on a hyperlink in your header and get timeout. you might wanna check it out