The Sennheiser EW100 G3 Kit Case was designed for 2 things. Keeping whatever is inside safe, and giving the customer an easy to use, user friendly approach to protection. Anywhere you can go this case can come. The case itself is a waterproof case and will prevent water penetration, even when submerged. The secret to the waterproof design is an o ring seal. The case also features a purge valve which allows air into the case, but keeps moisture and dust out. The reason for this feature on the case is so that opening the case in high altitudes is easy. (Otherwise the lid would be stuck shut) The Case comes in BLACK not the yellow depicted.