If you live in an area with really harsh winters then you need to make sure you get a frost guard that forms a nice tight seal over the windshield. If the product can’t make that good seal it is likely to blow off in the wind. This product from Ice King is designed with that very issue in mind.
The product uses powerful, rare earth N52 magnets in the guard’s edge along with side flaps to ensure a very close seal. The guard is constructed of durable material, making this an exceptionally well put together frost guard that should be able to stand up to just about anything in the winter.