FrostHalt Dehumidifier Bag
Pulls the damp out of your car overnight – so you get clear windows, a fresh-smelling cabin and no damp for mold to grow in.
Color indicator · Easy to recharge · No chemicals, batteries or liquid
One bag. Three winter problems solved.
Dry floor mats.
Snow from your boots melts and soaks in. FrostHalt pulls that moisture from the air so mats dry instead of staying damp.
Clear windows every morning.
No fog or frost on the inside – windshield, side and rear windows.
No musty smell.
Damp trapped under mats and in the trunk is how mold starts. Less moisture, fresher car.
Same windshield. One night later.
With FrostHalt
Without FrostHaltDrop it in. Forget about it.
Everything about FrostHalt
FrostHalt is a reusable silica gel dehumidifier bag with a built-in colour indicator. Put it on the dashboard, under a seat, in the back or in the trunk: while the car is parked, it pulls the damp out of the air around it. Clear glass on the inside in the morning, dry floor mats, a dry trunk, no musty smell, and an interior that gives mould nothing to grow on.
- Keeps the whole car dry: windows, floor mats and trunk, while the car is parked
- Stops the damp, musty smell at the source and keeps mould from taking hold
- Built-in indicator: blue = dry and working, pink = time to recharge
- Reusable for years: recharge in the microwave or on a radiator
- Light and compact: fits on the dashboard, in a door pocket, under a seat or in the trunk
- No chemicals, no batteries, no liquid, nothing to refill or spill
- Works in cars, vans, caravans and boats, and at home (wardrobes, basements, gym bags)
- Every bundle includes a non-slip dash mat so the bag stays where you put it
1. Place it. Put the bag on the non-slip mat on the dashboard. Door pockets, the rear shelf or under the seats work too.
2. Leave it. It works while the car is parked, overnight and during the day. No plug, no setup.
3. Check the indicator. Blue means it is dry and absorbing. When the window turns pink, it is saturated and needs a recharge.
Tip: for a larger cabin, a van or a car that gets very damp (wet shoes, dog, snow on the mats), use two or more bags, one on the dashboard and one in the back.
When the indicator turns pink, wrap the bag in a paper towel and warm it in the microwave for about 6 minutes at 600 W. Let it cool, and when the indicator is blue again it is ready to go back in the car.
No microwave? Leave it on a radiator for 1–2 days, or in a warm oven on the lowest setting with the door ajar. Repeat as often as needed: one bag lasts for years.
- 1 bag + 1 mat: 1 FrostHalt dehumidifier bag, 1 non-slip dash mat
- 2 bags + 2 mats: 2 FrostHalt dehumidifier bags, 2 non-slip dash mats
Recharge instructions are printed on the bag.
Free tracked shipping on orders over $40. Below that, shipping is $3 (€3 in the EU, £3 in the UK; free over €40 / £30). Orders to the US, Canada, Australia, New Zealand, Norway and Switzerland include import duties; elsewhere local import duties or taxes may be due on delivery.
Orders ship within 1–3 business days and usually arrive within 7–12 business days, with a tracking link by email as soon as the parcel is on its way.
Every order is covered by our 30-day money-back guarantee: try FrostHalt through a few cold mornings, and if it does not make a difference on the inside of your windows, write to support@frosthalt.com for a full refund.
How it compares
| FrostHalt | Disposable absorbers | Wiping the glass | |
|---|---|---|---|
| Works while the car is parked | Yes | Yes | No |
| Reusable | For years | Single use, then binned | — |
| Tells you when to recharge | Blue → pink indicator | No | — |
| No chemicals, no liquid | Yes | Varies by product | Yes |
| Effort each morning | None | None | Every morning, and it smears |
| Cost over time | One purchase | Repeat purchases | Your time, every day |
Reviews
4.9 based on 10 verified reviewsBetween snowy boots and wet floor mats, my car always felt damp. Noticed a real difference after using this for a few days
Amanda S. · Madison, WI · Verified buyerSimple product that does what I needed. Just leave it on the dashboard and there's less fog to deal with in the morning
Brian T. · Anchorage, AK · Verified buyerLove that it's reusable instead of something I have to keep buying. The color indicator is a nice touch too
Chris B. · Milwaukee, WI · Verified buyerHonestly didn't expect much, but it actually helps. Way less moisture on the inside of my windows now
David K. · Fargo, ND · Verified buyerI park outside all winter and the inside of my windshield was always a problem. This has helped more than I expected
Emily W. · Burlington, VT · Verified buyerBought two, one for each car. Super easy to use and both cars seem noticeably less damp in the mornings
Jason P. · Grand Rapids, MI · Verified buyerWinters here are brutal and I was tired of wiping my windows before work. This little bag has made my mornings so much easier
Jennifer L. · Buffalo, NY · Verified buyerDefinitely helps with the foggy windows. I do have to recharge it a little more often than expected, but overall I'm happy with it
Lauren H. · Portland, ME · Verified buyerMy windshield used to fog up every single morning. Since putting this on my dash, it's been noticeably better. Wish I'd found it sooner
Michael R. · Minneapolis, MN · Verified buyerThe musty smell in my car was driving me crazy. It's been a lot better lately, and my windows aren't nearly as foggy
Rachel M. · Duluth, MN · Verified buyerQuestions
No. FrostHalt works on the inside of the car. It absorbs moisture from the cabin air so less fog and frost forms on the inside of the glass. It does not melt outside ice, remove snow or heat the car.
The indicator beads change colour: blue means dry and working, pink means it is time to recharge.
Warm it in the microwave or leave it on a radiator until the indicator turns blue again, then put it back on the dashboard. You can repeat this for years.
Yes. It is a sealed silica gel bag: no chemicals, no batteries and no liquid.
One bag on the dashboard is enough to keep all the windows clear. If you also want dry floor mats and a dry trunk, we recommend two bags: one on the dashboard and one in the back seat area or in the trunk.
You are covered by the 30-day money-back guarantee. Contact us and we will sort out the return.
30-day money-back guarantee
Try FrostHalt through a few cold mornings. If you do not see the difference on the inside of your windows, send it back within 30 days for a full refund.