Thermacell Heated Insoles Proflex - Small (HW20-S) & X-Large - Rechargeable Battery-Powered Warm Insoles for Cold Weather - Perfect for Skiing, Hiking, and Winter Outdoor Activities

I bought this as a gift for someone. After about a month of use in the winter, he reported that these don't seem to make much of a difference in his hiking boots, but in the duck boots (waterproof) he wears to work, they make all the difference! He loves them and won't wear those boots without these heated insoles in them! He said he actually watched the snow melt right off the top of the boot. So I guess they're pretty great, it just depends on what type of footwear you use them in.Wish these were more thin. Wish they had a more pronounced molded footbed with some arch support.Going to order new boots a size larger to accommodate the extra bulk.Appears that they run about a size larger than the chart indicates. This is difficult to determine. My shoe size runs between 10.5 and 11.5. Ordered XL. They are a little big.Heating function is interesting. Insoles do not get hot. They provide a low level continuous heat. It works.Just received the heated insoles. I ordered this product because it states an extra battery pack is included. There is No extra battery pack included! Description and picture clearly show an extra battery pack. They seem to work just fine but I will contact Amazon about the missing battery pack.arrived on time and in good shape, these do not last long and one quite working already, I have used dr shoells also those are much betterNo idea if they work or notDescription of product was: 1 pair of insoles, 1 wireless remote control, 4 batteries, 2 smart charging cases, 2 wall adapters, 2 USB cables, 1 drawstring travel bag.I ONLY RECEIVED F1 pair of insoles, 1 wireless remote control, 2 batteries, 1 smart charging cases, 1 wall adapters, 1 USB cables, 1 drawstring travel bag.MISSING 2 BATTERIES, 1 CHARGER, 1 ADAPTER, 1 CABLE.One broke a Xmas gift for my so. He sent them back and they were lost someplace. They're gone now.I've always had trouble keeping my feet warm when outdoors in adverse conditions. I wasn't sure of how these would perform based on some customer reviews. But after trying them myself, I was pleasantly surprised to feel a discernible heat even on the medium setting. I was able to stay out longer as a result of the increased level of comfort.