I've used it snorkeling and snorkeling and it works great. No fogging until I exit my dive. I opened it up to change the batteries in the GoPro and left it open until the next dive to allow the temperature to stabilize. And no fogging on the second dive.
GoPro HERO8 Black Ultimate Bundle - HERO8 Black Camera, Shorty, Head Strap, 32GB SD Card, 2 Rechargeable Batteries
50 Review
π· Nikon W300 Waterproof Underwater Digital Camera with TFT LCD, 3-inch, Yellow (Model 26525)
9 Review
Photo camera Canon PowerShot G9 X Mark II, black
35 Review
π· Olympus Tough TG-2 iHS Camera: Unleashing Unmatched Durability and Superior Quality
18 Review