I just wanted to relay the experience I had with 3 different sets of hand warmers yesterday. It was super cold so it was time to break them out. I usually stock up on them at the beginning of the ski season and had three different brands in my box on the shelf: Little Hotties, Hot Hands, and Grabbers.
My adult daughter and I were on the slopes at 9:30 and had opened up a couple pairs (actually one set each for under out neoprene boot glove covers and one set each for our gloves).
It was so cold that we came in for a break (which turned into lunch) a little after 11am. She told me that her warmers were dead (little hotties). The Hot hands were only slightly better (in our boots)... but the Grabbers in my gloves were raging. Without thinking about the brand I gave her another set (not Grabbers, but I forget) and we set out again and skied til 2:30. Her hand warmers were about gone by that time. My grabbers were still going strong. Ok. We were done.
And so we got home about 7pm and I took the Grabbers and put them on the night stand. About 9pm I went to throw them away... STILL WARM!!!!
I am in no way connected with any product whatsoever and probably wouldn't have even bothered writing this except the difference was so profound that I thought I'd let folks know. Until yesterday I thought "a hand warmer was a hand warmer". I cannot be certain of the age of any of them nor can I tell if age matters, but I can tell you that theses three sets were purchased within the last year at Costco, Marshalls and TJ Maxx, only paying attention to the sale price for what I thought were similar products. All I can say with absolute certainty is which brand worked better for us YESTERDAY in bitter cold (-3F)