Product review (5 stars): My unscientific assessment leads me to believe they work like the product you use in a humidor
This product works.
However, the larger your freezer, the more pads you'll require.
I ordered two sets (4), bought two more sets (4), and just bought two more sets (4) today.
It doesn't really matte where you place them, but they must be placed singularly so as not to obstruct another pad.
You can place them on shelves, along the walls, or wherever you can place them so they don't interfere with each other.
As far as I can tell these things absorb moisture which eliminates the ability of frost to form.
My unscientific assessment leads me to believe they work like the product you use in a humidor.
Which might lead me to investigate that proposition, too, as I own several humidors!
Nonetheless, the product performs as advertised, delivery was efficient, and price point works for me!!!