I do like them and the definitely help reduce air flow around the eyes. I put a 4 due to really wish the foam was a bit taller. This would help it fit to more faces I think. The only other drawback to them is the hard nose piece.
I think it would be a very good idea to have either a softer foam molded into or as the nose piece, or maybe replaceable pads for them.
I have a set with full over the nose pads and they are VERY comfortable and help block any air coming in at the corners of the eyes.
Still overall a very great product!! Thanks for thinking of and producing here in the US
Absolutely love the sunglasses themselves but the inserts and the rail rubber slides are amazing and definitely recommend!