immun. is a sub line of the England-based fashion label CASH CA. Concentrating on high quality bags, the creative direction is executed by the multi-talented Kazuki Kuraishi. With that pretext, there is no surprise that Kuraishi would bring these two brands together for an exclusive release. The simplicity of the design recalls the gray interiors of the Heather Grey Wall store. The majority of the body is made from black Cordura twill material, while the bottom panels are constructed from artificial amaretta leather for durability. Internal capacity measures 43 liters and the shoulder pads can be interchanged with aftermarket pads as well. This backpack is available at the Heather Grey Wall store or at their online store right now.