Action camera recordings take place in wet, dirty and extreme temperature conditions. Clearly there is a need for confidence in the reliability of the SD card recording media, and Kingston Technologies has targeted their new Action Camera SDCAC/64GB microSD card directly at this kind of usage, and thrown in high data rate recording for 4K video as well. In this article for Benchmark Reviews we'll look at the construction and performance of the 64GB version of the Kingston SDCAC microSD and see how it performs with speed benchmark and environmental testing.