I bought these mittens with high hopes for skiing on the frigid east coast (Vermont). I have always struggled with cold extremities for skiing, and gravitated towards the Baker as the most extreme in OR's lineup. I almost always use disposable hand warmers. Unfortunately, I find that these mittens even with hand warmers are not very warm. The issue is that the liner is an insulated glove, not a mitten. My fingers are kept apart so they are unable to keep eachother warm. Furthermore, the built-in hand warmer pocket is above the back of your palm not your fingertips, so the only way i've found to warm up my figers is to pull them out of the glove liner, pull the had warmer into the glove liner, and squeeze them on the lift ride up. I'm currently shopping for new mitten liners, and will continue using the awesome Baker Shells as intended. I'm pretty sure these would be amazingly warm if only OR made the liners a mitten rather than a glove.