Update:I am dropping the rating down to 3 stars because I found out, upon testing the power pack, that it is no where near what they had advertised.. The listing says 10,000, the battery printing says 10,000, but upon testing it, I found that fully charging it from so drained that it would not even stay on, to full, it only accepted 6,244 mah.. That is about 40% less then what was advertised.. I will say that so far, it has worked.. I thought that maybe it would increase in capacity with a few cycles of charges, but I am sorry to say that it was not the case with this one..The reason I say that is because, I did get a air pump that was rated for 4000 mah, and the first full power cycling only gave a power charge of about 3,200, but after a few cycles, it did start taking a charge of just shy of 4,000.. It was something like 3,900 or somewhere around there.. Much higher then the original 3,200 on the first cycle.. But this one is not increasing like that.. Every cycle has had a rating of around 6,000 mah (plus or minus a little).. So I am taking one more star off for that reason.Original Review:The pocket part where you put your hands in is only limited on its heating ability.. Partly what makes up for that is the fact that it has a nice lining that helps insulate, and keep the cold air out from the side.. But the problem is, where they say the heating element is.. Well, that is the only place the heating element is.. What I mean by that is that if you hand is at the very top, or very bottom of the pouch, or even on the ends, there is no heat going to those places..With my hands, I have large hands.. I wear an X-Large in mens gloves.. and this whole pouch is not much longer then my hands are.. Because of this, I would say that the heating element only covers abour 50% of my hand, and on one side only (since I would have to double them up, one hand would have to be over the other, so the other hand would get heat on just one side too)..There is not much extra room for me to get my hands into the pouch either. If I was wearing something like bike or weight lifting gloves.. Or even a thin nit glove, then I could still get my hands into the pouch.. But with larger gloves like work gloves, winter gloves, etc.. I would say to forget it, because my hands with the gloves on will not fit.. I guess this might be different for someone with a size small hand..The material is nice and soft.. The thing does not take long to heat up either.. I kept mine on high, and it had a decent about of heat (where there was heat) to help warm your hands.. I like that it comes with a strap to carry it with you too..But the one thing that I like the best is the fact that it has a universal power pack.. What I mean by this is.. You can charge it from a Micro USB port, or a USB C port.. and it has 2 USB A outs.. and since the output of the device is only 2.1 amps.. Well, that means, since the plug for this just uses a standard USB plug, if the power pack every needs replaced, then you can easily get a replacement for it..Say if you know that you will need it for an extended length of time.. You can easily find a backup pack to supplement, and switch out with this one, when the battery gets too low, to make it run longer.. With the pouch on the front, you can keep all the accessories in that pouch, from the charging cord, to even a space battery pack, if you wanted to..My biggest complaint about this is the fact that I do not think that they made the heating elements big enough, and should have made them bigger to cover more of the sides so that my whole hand, from end to end gets some heat, and not just the middle of the hand.