I will say one thing..they are very expensive to use.

The Therma Cell comes with one butane cartridge and 3 burnable mats..That may last 2 hunts maybe 3.

The refill is 6.97 at Walmart. If I didn't have a decent job I'd be using mosquitoe repellent. The holster that holds the Thermacel is another 10,00

They aren't perfect..a couple mosquitoes may get through but overall...they were great.

One refill 6.97 ..one butane and 3 mats.
Holster10.97
Thermacell 22.97

Total$40 .91 ...whick may be good for 6-8 hunts,

Whereas mosquitoe repellent for one month or more .3.97