I work at a prison, so my phone is in my car everyday in Arizona heat. I put my phone in the PHoozy and that inside a insulated bag and it stay cool all day. I put a reusable freezer container inside as well.
I live on a lake and regularly kayak & pontoon, using my iPhone X to track my route. With previous water-protection holders, the phone tended to overheat and shutdown. Definitely not a problem with the Phoozy. It is a tad tight fit but not impossible. I wish the loops at the top were slightly larger, to easily attach to a belt or pack. All in all, a good product.
Love my PHOOZY! Keeps my phone protected on the boat.
Great - the Apollo was exactly what I was looking for!
Kept my wife's phone/battery working all week skiing in PC