I purchased the rock Bros extreme cold weather version which was about $50 based on the positive reviews that they were warm. There was one review that said that they look like they should be warm but they weren't. Unfortunately that review was the most accurate for those.

So I returned them and purchased these. They are worth spending a little bit more and getting a quality. Your hands move in and out of them easily they appear well-made and most importantly they keep your hands warm. I was out today and 14° actual temperature -3 windchill and I wore a light pair of gloves was fine.

The only slight knock is the end plugs that came with it, I couldn't get to expand very well into my handle bars - factory Yeti bars - so I just used my existing end plugs instead and they worked fine. The positives far outweigh that little adjustment. I used these with a pair of the Rockbro Neoprene gloves and mountain biked when it was in the teens and 20's and once it warmed up in the pockets hands were toasty warm. Once it got into the 30's on a couple rides was able to take my gloves off and just ride with these. Plenty of room for brakes, shifters, dropper post shifter controls. Easy to get hands in and out of even with the "bonus cover" that velcro's in the openings. Side tip if transporting on a bike rack, I just took a couple bungee cords and folded the mitts forward and tightened them down with the small bungees so they wouldn't flap around on the highway. They may do fine but didn't want to risk tearing them up or tearing the thinner spot where the end plugs went in. Takes like 30 seconds and seemed to be a good preventive measure. Worked great and had no problems.

My hand are EXTREMELY sensitive to cold. For comfort I need gloves in temperatures starting in the 50s. Being an outdoor enthusiast this has been a very difficult problem to solve. Even with high-end mittens my hands, especially my thumbs, would become painfully numb after a short time in temperature staring in the 30s. I bought a highly reviewed pair of heated mittens. This worked well on hikes but the battery wouldn't last through a chilly 35-60 mile bike. A cycling friend lent me his Bar Mitts (not the e
Extreme model) and I tried them while wearing my heated mittens on a 20 mile ride in 28 degree weather. The first positive discovery is that it was not difficult slipping my mittened hands in and operating my rapid fire shifters - the second, that I never had to turn my heater on. I bought the Extreme Bar Mitts and went for a 35mile ride with the temperature staring at 12 degrees, reaching 18 halfway through my ride, and climbing to 25 by the time I got home. It was brutally cold - a real test for my Extreme Bar Mitts. I started with unheated gloves but brought along the heated mittens. By 15 miles my hands were reaching that painful stage. The temperature was moving towards the high teens. I stopped and switched into my heated mittens, turning them on high until my hands recovered, then switched to low, got back on my bike and continued the ride. After 15 minutes I was able to turn off the heater for the remainder of the trip and the residual heat trapped in the Bar Mitts together with the temperature moving into the 20s allowed my hands to be completely comfortable for the remaining 20 miles. Given how cold it was and how terribly sensitive my hands are, I found my experience very encouraging. While I will need my heated mittens with the Extreme Bar Mitts in temperatures down in the teens, in the 20's ordinary mittens/gloves will do. For the first time I can go biking in very cold weather confident that I can keep my hands completely comfortable. I rate the Extreme Bar Mitts very high.

I use these for my work commute. They perform great. They are soft, but still rigid enough to stay upright (or whatever position I place them,) and not be all floppy, which helps when inserting my hands on the go.
I live in northern Montana and have used these in -18°F temps thus far. I still wear thin gloves in case I crash, but I have zero issues keeping my hands warm. There are certainly cheaper options out there, but after reading the reviews, I spent a little more for something that was sure to work. Glad I did.

i've tried numerous combinations of different styles of gloves and none of them provided the level of protection that i get from these things. finally i can ride in temps