I live in a warm western climate. Bought these for a recent January ice fishing trip to MN. Handled it well but my finger tips were always getting cold if I stayed outside the shelter for more than an hour. I fired these hand warmers up on the middle setting and put one in each pocket and it changed the whole trip for me. I was out every night in some windy / cold conditions for hours. These hand warmers have changed my enjoyment for hard water fishing. Great Product!

They are the best I can find. So far so good I've been testing them out every day.

Really great hand warmer that lasts a long time. Light and cell charger are wonderful additions.

I purchased the previous Clam hand warmer and really like it, but the new updated model has even better features. I really like that the USB area is now covered as the original one sometimes got moisture in it, which worried me, but so far has kept working. The new ones are also slimmer than the previous model which is nice for packing. It's definitely super warm and great to keep in a pocket to keep hands heated and it's come in handy as an emergency charger for my daughter's tablet!

I use it for spring/fall fishing, hunting and ice fishing. On low power (equivalent warmth to a chemical hand warmer) I’ve had it last 9 hours with charge to spare. Love the new flashlight!!

There are others out on the market but the 10,000mAh battery is the way to go. Very convenient to be able to change the heat settings and charge your phone. I had the previous model as well, but excited to have the flashlight when getting on/off the ice in the dark and to flash glow jigs/lures!

Awesome hand warmer. I have last year's model too; this one is great with the flashlight built in. They both work great for charging phone also. I will use it both hunting and fishing.

This handwarmer is very warm, the battery lasts a long time, and the added flashlight and ability to charge your phone is great! I highly recommend this if you get cold hands. Pair it with the Clam Hand Muff and you have a great combo.