How do air-activated hand warmers work?

Opening the foil packet exposes the contents to air, and an iron-based mixture reacts with oxygen to give off heat. They keep warming for several hours, then cool down and are thrown away.

Can I reuse or recharge them?

No. They are single-use. Once the reaction is spent, the pouch is done. Rechargeable electric warmers are the reusable alternative.

Will they work in a sealed pocket or glove?

They need air to keep reacting. Tucked in a glove or pocket they still get some airflow, but sealing one in an airtight bag will slow or stop the heat.

How long do they stay warm?

That depends on the brand, the surrounding temperature and how much air reaches the pouch. Most run for several hours; expect output to taper toward the end.

Are they safe against bare skin?

Do not place one directly against skin for long periods, and check on children, older adults and anyone with poor circulation. Follow the packet's instructions.

Each warmer comes in its own foil packet. The set contains several individually wrapped warmers, ready to open one at a time.

Where is the Disposable Air Activated Hand Warmers cheapest?

At Deal.ai, for $17.99, as of our latest check.

Free shipping on everything10% off your first orderNo account needed · Buy 2, save 10% · 3+, save 15%

Disposable Air Activated Hand Warmers

Sold and shipped by Deal.ai

$17.99Free shipping

Buy 2, save 10% · 3+, save 15%

Extra 10% off your first order

Specification: OUHOEDisposableHand Warmers2pc

Arrives about Nov 21 – Dec 1, from a warehouse in China

30-day full refund: if you're not happy with it for any reason, or it never arrives, tell us within 30 days and we refund you in full. Shipping and refunds