Perfect for Winter Sports - I bought this for my snowboarding trips to keep my hands warm when we are in between runs. This thing warms up so fast and gets so hot I can warm up even wearing my thinner gloves. (which is so nice not to have to strip off all the layers.) It's great after a day on the mountain to be able to charge my phone, too. I usually pack it in my bags, then plug my phone in while we grab lunch. It's pretty sturdy, so I don't have to worry about falling on it and breaking it. My friends usually end up stealing it from me when we're taking breaks, so I know what everyone's getting for Christmas this year!