Omega NATO Strap 031ZSZ0020535 stripe black and grey nylon fabric strap with stainless steel buckle and fitted keepers OMEGAs NATO inspired straps have been influenced by some particularly robust and storied ancestors and can trace their earliest origins to the Second World War. Available in a variety of bold colours and materials, the NATO straps of today convey the essence of the originals while exhibiting a more contemporary and stylish look.