Do they warm the fingertips well or just the palm?

Trick question? I imagine you mean if you put them in a glove with your hand in it, will it warm the fingertips.? Yes, it takes a bit like 30 minutes before they are really starting to hit the heat. Put in palm, your whole hand, wrist will be quite toasty if you are outside and it is 20ºf. Be well and Long Live Our Republic !

Is there a trick to these? We can't get them to be more than slightly warm...

The trick is to get them warm before you head out into the cold. Or, if you have to start them outside, at least try to keep them out of the cold wind while you are shaking them to activate them. You could activate the warmer under your coat if you have to crack them open outside. But the best trick is to plan ahead and start these things inside where it’s warm.

what is the average temperature?

Warm but not hot. It is described as “natural heat.” I found them to warm but not burn hands. I didn’t find a temperature specified but they are warm and comfortable.

can they be turned off and reused?

These work because a chemical reaction occurs in the presence of oxygen That the various chemicals react to create heat. So no, you can’t exactly turn them off. But...but...but...you actually can, in a way. If you’ve been using these to keep hands warm for much less than the 8 hours or so that they are rated for, you can take them out of your gloves and put them right into an airtight environment (think ziplock sandwich baggy) they will cool down and heat up the next time that you expose them to air. I’ve used the same pair for up to four times if I’m skiing for brief periods of time.

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Hot Hand Warmers 11 Hours Long Lasting - 40 Count - Natural Odorless Safe Single Use Air Activated Heat Packs for Hands, Toes and Body - Up to 11 Hours of Heat - TSA Approved

Product ID: 258801395

Details

Brand
lentra
Colour
White Hand
Material
Iron powder or
Recommended uses for product
hiking camping
Size
40

🔥Up to 11 hours of continuous heat

⏱️Activates in minutes with air exposure

♻️Eco-friendly, disposable & odorless

€ 94.08

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Stay warm, stay unstoppable — heat that lasts as long as your hustle!

SAFE NATURAL COMFORT - Made with odorless, non-toxic ingredients safe for adults and kids alike.
INSTANT HEAT ACTIVATION - Just open, shake, and feel warmth in minutes—no batteries or plugs required.
TSA APPROVED TRAVEL READY - Carry these compact heat packs anywhere, hassle-free on flights and beyond.
BULK PACK FOR EVERY OCCASION - 40 single-use warmers ensure you’re always prepared for winter’s worst.
ALL DAY WARMTH NO RECHARGE NEEDED - Stay cozy for up to 11 hours—perfect for long outdoor adventures or chilly commutes.

Lentra Hot Hand Warmers deliver up to 11 hours of natural, odorless heat with easy air activation. TSA approved and eco-friendly, these single-use packs are perfect for hands, toes, and body during outdoor activities or daily cold weather challenges. Each pack contains 40 disposable warmers designed for safe, instant comfort without batteries or plugs.

Specifications

ASIN	B07GNW4WKN
Battery Description	disposable
Best Sellers Rank	#69,743 in Sporting Goods ( See Top 100 in Sporting Goods ) #74 in Disposable Hand Warmers
Brand Name	lentra
Color	White Hand Warmers
Customer Reviews	4.4 4.4 out of 5 stars (12,040)
EU Spare Part Availability Duration	11 Hours
Included Components	40 count hand warmers
Item Type Name	handwarmers
Manufacturer	lentra
Manufacturer Part Number	Handwarmers-40
Material Type	Iron powder, plastic or aluminized plastic
Model Number	Handwarmers-40
Number of Items	40
Number of Packs	1
Power Source	Hand
Recommended Uses For Product	hiking, camping, winter summer
Reusability	Single Use
Size	40
Target Use Body Part	Hand
UPC	632030540777
Unit Count	40 Count
Upper Temperature Rating	104 Degrees Fahrenheit

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€ 94.08

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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