This is a single version of the same red covers originally provided with Classic Packs individually and now already attached to the front of the modern Packs. This is a single replacement for a lost cover.
A different product is two covers with a short leash between them is called the ACCX.
These DO NOT help make the Lumedynes water proof! They do help avoid splashes reaching your high voltage connectors. Don't get Lumedyne gear wet. However, these should help keep your important connectors as clean as possible whenever they are not in use.
