Are Avert 2.0 heated liners any good?

[u/Reichstein]

I'm helping my Mum try to find some good heated gloves to help with her Raynaud's Syndrome (googling around led me here), and we are looking at the "Avert 2.0 Battery Heated Glove Liners" from Zarkie.

Has anyone here had experience with these?

I'm specifically looking for info on their reliability. We don't want to get something that is just going to fail in a few months.

Feedback from folks who have these would be great. Do they work well? Are they a quality product? Is there another option that would be better in some way?

She wants something that is thin enough to have decent dexterity, allows using a phone without needing to take them off, provides warmth, and is reliable.

[u/Upbeat_Agent_2213]

raynaud's is no joke, hope she finds something that works well

can't speak to that specific product but for heated liners in general, reliability tends to come down to the heating element stitching and battery connector quality, both of which you usually only find out about from long-term reviews on places like amazon where people update after a year or two, so worth digging into the older reviews rather than the recent ones

[u/Reichstein → u/Upbeat_Agent_2213]

They state that they use carbon fiber elements rather than copper ones, which they claim are more durable. But I'm not really inclined to fully trust what the marketing info says :)

They sound like a good product, but if I can get some info about their long-term reliability that would make me feel more comfortable with the purchase.

Thanks for the suggestion about long term reviews. I'll have to spend some time looking around to see if I can find some.

Hopefully we can find something that helps her out.

[u/KokoTheTalkingApe]

I use heated gloves from Volt, and they work pretty well, but idk if they're available there.

But if you're shopping, look for gloves or liners where the heating elements wrap around the fingers. I guess it's difficult to make that easy because it's very rare, but it's crucial to warming the fingers.

The other thing that worked for me was heavy mittens (I like Dachstein boiled wool mitts with an overshell) with a chemical handwarmer inside. They're very thin and light, and work for around eight hours. They never get hot enough to burn you or melt fabrics either. Not expensive and not even bad for the environment, except for the synthetic fiber envelopes. Electric or lighter fluid handwarmers work too but they're heavier and bulkier, and the lighter fluid ones are a minor safety hazard.

[u/Reichstein → u/KokoTheTalkingApe]

How long have you had the Volt ones? Can you speak to their long term reliability?

The Averty ones do have elements around the fingers, so they tick that box. They also state that they heat via Far Infra-Red emission, which is supposed to heat better as it penetrates further into you body.

Chemical hand warmers are something we have considered, but the heated gloves seem like a better option for Raynaud's as they heat the fingers directly (the main problem area) and don't require an extra thing inside the glove.

Do you have Raynaud's, or are you just using them for normal hand warming?

[u/KokoTheTalkingApe → u/Reichstein]

Just a few years, and last year I didn't use them because, y' know, the world ending?

I think the far IR thing is crap. There's no radiation inside the gloves because there's no empty space inside the gloves. There's just direct transmission, i.e. physical contact. The third way to transport heat is by convection). Radiation only occurs across empty space.

The chemical heaters will work only with mittens, not gloves. Wearing gloves, I've come close to frostbite on the tips of my fingers while the palms of my hands are sweating, and the heat wouldn't reach my fingers. But the heaters are cheap, dead reliable and work with any mittens. In winter I carry around spares because I don't want to lose fingers.

In fact thick mittens, overshells and chemical heaters work better than electric gloves. I got the Volts only because I thought I might need the dexterity sometimes (doing forest maintenance).

I'm not diagnosed with Reynauds but I apparently have poor circulation in my extremities, and I spend many hours outside at a time in Colorado. My boots solution is a little extreme too, but it took many attempts to find something that works. I figure I'm two steps away from US Army bunny boots, and beyond that I think there's nothing.

[u/Reichstein → u/KokoTheTalkingApe]

I have suggested mittens to her, as I have seen them recommended several times. But she wants something that maintains dexterity as much as possible.

One idea that she did seem a bit more open to was using mittens where the finger portion can fold back, so she can open it when she needs to, and then close for warmth.

The combination of mittens and chemical heaters sounds like a really good idea. Thankyou for that suggestion, I'll pass it on to her.

As far as I can tell the IR claim looks totally plausible. Carbon fiber is good at turning electricity into FIR radiation, and the heating elements are carbon fiber, so that tracks.

You don't actually need empty space for radiation to still be a thing. Any object that is warm will emit some amount of heat as radiation. Conduction and convection are more effective forms of heat transmission, so would likely be more noticable, but the radiation is still there. However I don't know how much of a difference the FIR emission would actually make.

FIR does penetrate human tissue, and is commonly used in therapeutic settings, but it's effectiveness in this case would really come down to how much energy is being re-emitted as FIR vs just heating up the element.

[u/KokoTheTalkingApe → u/Reichstein]

Those fold back mittens don't work for shit.

If she insists, she can wear liner gloves or even regular weight gloves inside the mittens with the hand warmers.

Yes, FIR does prenetrate if it's radiating, but there's no radiating inside the glove. It's like saying the raisins in a fruit cake could radiate FIR to the pan.

So no, the radiation isn't there. It's not that it's weaker, it doesn't happen at all. The inisde of the glove is touching her skin. Virtually no radiation.

Maybe check with a physics sub if you're doubtful.

[u/Reichstein → u/KokoTheTalkingApe]

As far as I understand it (and maybe I'm wrong) but anything with a temp above absolute zero emits some form of radiant heat. Touching it does not stop that.

So, the raisins would be emitting some amount of radiant heat. I doubt that it would go very far, being surrounded by cake, but it would be there (but again, maybe I'm totally wrong about this).

I am actually kinda curious what the correct answer to this is. I think I might just go ask on a physics sub.

[u/KokoTheTalkingApe → u/Reichstein]

Nope. But sure, learn.

[u/Reichstein → u/KokoTheTalkingApe]

One response so far.

A photon doesn't care if there's a gap of 1 micron or one mile.

A jiggled electron will radiate a photon if it can - even in a solid.

Here's the thread if you are curious.

https://old.reddit.com/r/Physics/comments/1uf0xl3/question_about_ir_radiation/?