I ride a motorcycle and try to extend my riding into the late Fall in New England. Anyone who rides knows that warm hands give you to a better experience, but they are critical to a safer ride. I have heated grips and even heated gloves that are wired to the bike through my jacket for those really cold days, but wanted something that was battery operated that would fit under my leather riding gloves. I received the Snowdeer gloves and the fit was very true to the measuring chart. I wear a large glove normally and these were a perfect fit. Trying the glove liners on at first, I didn't feel like they were heating up, but I tested them out on a cold October ride in Maine. I started out ith the liners turned on the High setting. I rode for about 90 minutes and my hands were perfectly warm the entire ride. I was skeptical, wondering if it was just a nicer day than I thought and weren't sure if the liners were doing anything. I stopped for lunch and decided I would not wear the liners on the ride home. Within the first 10 minutes I noticed a huge difference. My hands were much colder and by enough of a degree that I pulled over and put the gloves back on. I finished the ride and was convinced that these liners were really helping. They are decently made, but I did have a slight issue getting the cuff over my hands. Once these are on, they fit perfect and the stretch in the glove is comfortable. The cuff is a stiffer material. Some people comment about the cuff being a problem, but I kind of like the way it wraps my wrist. Because I was pulling on the cuff to get them on, I may have damaged one of the gloves . I remembered getting a nice email direct from the seller when I received them asking to tell them if I had any issues, so I replied to that email explaining the issue and had an almost immediate reply. The representative offer to replace the gloves and immediately sent a new pair. I was very happy with the service and impressed with how concerned they were with my satisfaction. I'm pretty particular when I order something and I want it to work as advertised. These gloves work! I gave everything 5 stars but the "Stretch" category, simply because of the issues I had with the cuff, but I've gotten very used to them and like the way they fit. There was no review field for service but I wanted to mention the service as it made a huge difference in my experience. I would add that the batteries give you about 2 hours of heat on the High setting.