Howler Bros H Bar B Tech Shirt Longsleeve The H Bar B Tech is the technical member of the H Bar B family. Its lightweight stretch nylon-poly fabric, vented rear yoke and ring snaps give you an advantage over the elements without making you look like you set out to conquer the world when you're just taking care of everyday business. Other features include our signature sunglass cleaning microfiber at the right hem and a hidden zipper pocket at the lower right seam.