The ERDL pattern, also known as the Leaf pattern, is a camouflage pattern developed by the United States Army at its Engineer Research & Development Laboratories (ERDL) in 1948. It was not used until the Vietnam War, when it was issued to elite reconnaissance and special operations units beginning early 1967.

The pattern consists of four colors printed in an interlocking pattern. It was initially produced in a lime-dominant colorway, consisting of large organic shapes in mid green and brown, black ‘branches’, and light green ‘leaf highlights’. Shortly thereafter a brown-dominant scheme (with the light green replaced by light tan) was manufactured. The two patterns are also unofficially known as "Lowland" and "Highland" ERDL, respectively. We have taken the liberty of scaling it and coloring the pattern differently.