Review on CASEMATIX Waterproof 15.6 inch Laptop Hard Case - Ultimate Protection for Acer Nitro 5, HP Pavillion 360, Lenovo Flex and More by Kevin Kimbrough

There is a valve on the body. I laughed until I closed it and then I went to open the case and he struggled a bit. Didn't try to check anything, just closed the valve to keep it from hanging out. Now I close it to keep the humidity! I live on the island and bought this to 'reduce' the impact of the local atmosphere and give me a nice, durable carrying case for my new work computer. Being truly hermetic was something I ignored in the description as it's usually "marketing only" and unless you're buying an expensive Pelican just ignore such claims. The thing is also very hard. If I'm attacked, I can probably easily hospitalize the attacker with this thing if I swing it at them. This is how you can protect yourself with it. LAUGH OUT LOUD. joke but true. It comes with a warranty card which is a lifetime warranty if you sign up with them. Very very happy with the choice. I bought a second, bigger one for my old computer because I think that in this case it can work a little longer. Yes I bought one for a near dead laptop because I think I could use it for other purposes for a while if I could get it out of the moisture and I think the case could do that for me. GET ONE.