The Kingston 32Gb SD high capacity memory card can expand your action cameras memory to be able to capture hours of video and thousands of photographs.
If filming in standard definition you can expect to capture up to 16hrs of video on this card (or longer if you drop the recording resolution) and if recording in 1080p high definition you'll be able to capture approx 6 - 7 hrs of video.
The Kingston high capacity class 4 SD cards are the recommended cards for helmet cameras.