The Easy See
Get a Good look and know for sure.
The only way to know for sure how your hives are doing is to get a good look at the brood pattern and see the eggs and larvae.
It was a struggle for me to see between the mesh on my veil and I would miss seeing eggs sometimes. So I decided since I will not remove my veil in the bee yard I needed to remove only the mesh.
The Easy See does that, and replaces it with a 5 x 7 clear window that is fastened together with 10 metal screws, now I can see clearly into the hives without allowing curious bees to get too close.