The on/off/sleep button. Is kinda tricky at first. Toggle button, is tricky as well. But, I often read at the beach, or outside, along a windy shoreline.. It definately will keep, drizzle, rain, sand, and dust.... OUT of the nooks and crannies of the device!!! It's like a rainsuit/ wetsuit for the device. Function of buttons will suffer, a little for ease of use.
But, it Definately, gains protection.... Worth the hassle. I only use this cover while in outside conditions. Say on a beach chair over the sand, pool area, wind, etc. Get more detail about OCTO Splash Proof Case (Fits 9.7" Display, Latest Generation Kindle DX) - Black.