For products with good waterproof performance, when the external temperature or humidity changes drastically, the internal part of the lens may be fogged. After a period of time, the fog will naturally disappear; this is a normal physical phenomenon.
Transcend’s DrivePro Body series are ensured with a certain level of waterproof, and thus this phenomenon is quite normal.
Note: Transcend’s DrivePro Body series are not equipped with the anti-fog function which is specially designed for the phenomenon.