Manufacturers of Containers and Harnesses for skydiving. "Containers" are the backpack-like things that your "canopies" (parachutes) are kept in when you jump out of a plane. "Harnesses" are the straps that keep the container (and canopy) attached to you. Most containers are permanently attached to a harness, hence this is just one category. (Note that "Skydiving" and "Parachuting" mean the same thing).