Thermal Phone Case Prevent OVERHEATING in The Sun, Cellphone Pouch for Camping Prevents Freezing, Extends Battery Life, Outdoor Warm Cover Bags for iPhone,Samsung Galaxy Yellow

Works as expected for both Sauna and Steam sessions of 25 minutes. One caveat is that I have to remove my phone anti-shock cover so it can fit in the sleeve (I have a OnePlus10 device)

This product is worth every penny. It saves your electronic device from extreme heat and cold so your battery life last longer and is not effected by the weather. The quality of the material is top notch and easy to clean. It is waterproof from rain but I would not suggest submerging it in water as I have had no reason to do that so I can not confirm or deny it's effectiveness in that regard. It is also durable and the zipper stay in tack. This product can fit a phone as large as the galaxy s20 from what I have used it for as well as the galaxy Z fold 5.

Tried to use this in the sauna and day one was great but maybe because the sauna wasn’t all the way up because when I went back again the next day my phone in the bag didn’t last longer than 10 mins in the sauna before it over heated. I like the look and fit though. I still use it, I just don’t sit in the sauna longer than 10 minutes with it.

It's too short for my phone needs to be another inch longer

I can take this in the sauna at the gym and it keeps my phone from over hearting. I need a second one just for my car. I live in the deserts that easily get to 105 to 115*