Cheap Indus-Tool CF Cozy Feet Heated Shoe Insoles

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List Price: $24.99
Sale Price: $13.85
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I agree with the other reviewers that these inserts are cheaply made and the battery packs are a bit awkward, but I have severe problems with cold/numb feet, and these inserts have made it possible for me to be outdoors in the winter for the first time in over thirty years. You must be careful replacing the batteries, as the contacts in the battery holders are VERY fragile. The inserts are paper thin, so they can be used even in tight-fitting shoes, unlike battery-heated socks, which are too bulky to fit in any shoes or boots. The inserts are also better than the single-use toe warmers, because if your feet get too warm, you can simply unplug the wires from the batteries. I hope this company will improve the design and quality of these inserts--I'd gladly pay more for a better product. In the meantime, twenty bucks for these inserts is a good deal. Just make sure to also buy a AA battery charger.

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I got this for my boyfriend for christmas, and he hasn't had alot of time to judge the product since it's been warm out, but these are his initial responses:

Pro: Heats up his feet quickly and they stay warm.

Cons: They can get uncomfortably hot if left on for too long. The strap to hold the batteries isn't uncomfortable or problematic, but it is inconvienent. Also, the shoe insert will slide backwards, so unless you want to adhere it to your shoe, it will become very irritating.

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These foot warmers are wonderful. The only negative thing I can say is that the wires can be annoying, but once you have them on, you don't notice anything except for your warm toes. You can conveniently turn them on and off as needed. I get a solid 4-5 hours out of a set of rechargeable batteries. This is my first winter with them so I cannot say how durable they are, however even if I have to buy new ones every year--they are well worth it.

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These things are designed for 3.0V from two alkaline batteries. The power they put out is related to the square of the voltage, so with alkaline lets just say it puts out 9W.

But rechargeable AA's have 1.2V each. Which means two puts out 2.4V. Thus the power output from a set of rechargeable batteries are 5.8W, or less by a third.

I went through the effort of getting a triple AA pack and a chip that changes the 3.6V output to 3.0V and could handle the amperage to get 9W even with rechargeables. Not a task to be undertaken unless you have a good understanding of electrical circuits.

Once I did this, my wife, a displaced Texan in Iowa, won't go outside in the winter without them. And eventhough she has to replace the batteries each day, they are rechargeable.

I just wish you could buy a set designed for this.

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These are an excellent option to keep your toes warm in the winter if you have poor circulation like me. They cost a bit more than the chemical warmers, but quickly become more economical since you can use them over and over. Unlike chemical warmers they keep working even when your footwear is basically airtight like many well-insulated boots.

Runtime can also be as long as you want since you can switch batteries, but I get about 3 hrs on one set of batteries. They also take standard AA (including rechargeable) so you don't have to purchase expensive battery packs like some alternatives.

They are best used in an already warm piece of footwear though. They don't get super hot, but I find them to be the perfect temp for helping with poor circulation on cold winter days.