PREFIRE ULTRA is an extra-large, air-activated hand warmer designed for longer sessions in the cold. It delivers consistent heat for 12+ hours, making it ideal for outdoor work, long days on the mountain, sidelines, or extended gaming sessions.

This is the most powerful pouch in the PREFIRE lineup. More heat. Longer duration. Built to stay with you.

PREFIRE ULTRA is an air-activated hand warmer. Once opened, the natural ingredients inside react with oxygen to produce steady, controlled heat.

Just rip it open, shake it, and it starts warming within minutes.

No batteries. No charging. No effort.

Each PREFIRE ULTRA pouch delivers 12+ hours of consistent heat.

Heat builds gradually after activation, then stabilizes to keep your hands warm for the long haul. Perfect for full-day use in cold weather without needing to replace or recharge.

Use PREFIRE ULTRA anytime you need long-lasting warmth and focus:

* Skiing or snowboarding
* Hiking and camping
* Cold-weather work
* Sports sidelines
* Early mornings and late nights
* Long gaming sessions

Any moment where cold slows you down, ULTRA keeps you locked in.

Each pouch contains a simple blend of natural materials:

Iron powder, water, salt, activated charcoal, and vermiculite.

These ingredients work together to generate safe, consistent heat when exposed to air. The contents are non-toxic and designed for reliable performance in a compact, disposable pouch.