Nothing and Rubbermaid container
By helmet-cam I assume you mean a lipstick cam? If so it does not need any protection. I used to pack my camcorder in a Rubbermaid container. See my video how to section. And be sure to take any plastic lens cover off the lipstick cam to prevent fogging and improve the image and colors.
By helmet-cam I assume you mean a lipstick cam? If so it does not need any protection. I used to pack my camcorder in a Rubbermaid container. See my video how to section. And be sure to take any plastic lens cover off the lipstick cam to prevent fogging and improve the image and colors.