The size runs smaller than expected. The extra warmth is nice to have..I am getting a refund on my second order instead of the first order. I am return the second order today. The refund you're giving me is for this order I am returning today. Please check your records this order I am returning is size XXL vest. The first order is sized XL which was too small. The XXL size order was was not comfortable and not enough heat distribution on my body. That's why I am returning it today. Thank you.Fits a little loose which helps keep the heated areas from getting too hot through your shirt. Gives a good amount of heat and helps keep your torso warm. I work in a cooler all day and has helped me shed some layers. Uses a USB interface for the power supply. This makes it easy to bring along one of my extras if I need it, which I haven't needed to yet.This is a great company to deal with, my first battery pack had a problem and they shipped a replacement super quick. The vest works really good heats up fast. It is warm enough for all but subarctic conditions. I bought it for use for morning motorcycle rides to work and it works awesome for that. You can’t beatIt for the price AAA plusOrdered a large for a gift for a person that normally wears a medium and this is very tight in the arm pit areaUnfortunately I didn’t get to try it because my son overseas wasn’t aloud to have it for being in the military. But upon opening it up and seeing before knowing that. Very soft and very well made. Almost kept it for myself. LolThe reason I bought this cheap vest is because the one I have has a bad power switch which can only be purchased from China. I refuse to take that chance. The vest works but it doesn't hug me around the upper back. I believe this is due to it being a V neck. I can barely feel the heat from the other pads which my other vest has the pads in the same locations and it made me sweat when on high. My best suggestion is spend the extra money for a good heated vest so you can be pleased. The one good thing is it comes with a power pack. I was actually shocked.It heats up quickly, unfortunately it was too smallI was surprised how good the lamp is for the moneyReally good quality for the price very pleasedGreat light, does what you think it should do.poor quality the lamp fell off the headbandTested and works well, I had been a doubter of these but given it a try and so good