Impact & temperature resistant, corrosion proof The case is made from engineered plastic injection molding, which is strong and durable. It can withstand temperatures of -25 to +60 degrees and for a short duration even -40 to +80 degrees. EVA shock-proof lining offers increased protection The CNC-engineered, high-quality EVA lining offers a snug fit and ultimate protection. Easy and safe to open during altitude and temperature changes It's equipped with a pressure balance valve to prevent unwanted vacuum sealing (or bursting when opening) caused by air pressure differences due to temperature and altitude changes inside and outside the box.