Like the others mentioned here, they do not completely cover the hole. I think someone who didn't understand RVs measured the inside of the opening. The fabric hangs down slightly and leaves a slight gradient. Second, the fabric is still somewhat transparent. Do they work at all? Of course. And I use mine. Making them great would be easy. Make them a little wider (they still mount the same way). And maybe use a different material. It's a shame because the concept is really good and travelers like me really want a product like this. I would prefer these overvent inserts as they are more attractive and always ready to go. I still appreciate the product and need more. I couldn't find anything like that. For your health.
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