Alphacool 7V Rechargeable Circulatory Cooling Vest 3L Bladder Mini Pump Summer

Very impressed, so far so good, with the florida heat these are definitely a life saver. With the bladder to the full line I personally find them a bit to heavy to be comfortable in our industry which involves going up and down ladders on roofs etc, but filled about 2/3rds of the way I find the weight better and more comfortable. So far very few complaints, as I type this Im wearing it it's about 95 degrees I started the day with a frozen bladder and I'm going on about 2 1/2 hours. We purchased one for everyone on my crew and everyone seems to like them. Personally im about 20lbs over weight so sometimes I just leave it unzipped in the front and it still cools me well.

It works but it's not a perfect system. If I completely freeze the water pouch it'll last for about 3.5-4.5 hours. If I just use ice it'll barely last an hour. But if you freeze the pouch you need to run it under some water or it won't work for quite some time. I've found the best way to use it is only turning it on for a few seconds at a time rather than continuous. One the skin cools down you stop feeling the benefits from it as much till those areas warm again. I've also noticed it getting so cold it collects condensation and feels like it may be able to cause frost bite if you're too wreckless with it. It's also not perfect at keeping your whole body cool, but it will give periodic relief. As someone who works outside for hours on end, it does help, but it doesn't compete with just getting into the air conditioning. Plus it will cool you from standing in the heat, but it won't stop you from heating up from exercising or working. Like I tried using it not get as hot in Beat Saber, but it just doesn't cool the whole body enough for that. Would need a whole body suit for that.

It will keep your torso cool, but will not stop sweating. Good for working comfortable in the heat. I use it for construction work, I work outside all day. You will have to fill bladder around 3 times a day to keep vest running efficiently.

Let me start by saying I'm a firm believer in happy wife, happy life, and my wife can't take the heat but we live in AZ. There are a few things that can't be helped, like the ice not lasting, but if you freeze the bag with 3 liters in it, it will last quite some time, however, I also know that takes a day or more for a freezer to do. The 2nd thing, is wear something over top of the vest so hot air is not warming all the water out of the bag. My wife wore it for 8 hours, and changed in the middle of the summer here in 117°F heat and it was cold the whole time. She even had to turn it off a few times as she was getting too cold. So awesome!

The battery easily lasts several days of use, 2-3 hours a day, however the ice reservoir does not. In warmer weather or high activity, the ice melts in under an hour, and is warm to the touch within 2 hours.