Because of the natural design of the bamboo, no two back panels will look the same, adding a degree of customization to the phone. Although the bamboo is the only StyleSwap cover soon to be available, other back panel replacements are expected before the end of the year. Those include back covers made of denim, different variations of wood, and Kevlar. There is no word from the manufacturer on when these other options will be available. All of the StyleSwap covers will be priced at $49.
The default covers for the Silk White and the Sandstone Black versions of the phone have also appeared on the OnePlus website. These will be priced at $29 each. OnePlus has released a video about the bamboo back cover, along with one showing the finer points of replacing the back plate. You can view both of them by clicking on the video slideshow, below.
source: OnePlus (1), (2) via AndroidAuthority