So i went ahead and bought myself a really nice pair of sunglasses and i wanted to make sure they stayed protected and were easy to access.  I carry a EDC bag (Maxpedition Monsoon)  and this strapped onto my webbing on the front of my bag no problem and to be extra sure it stayed in place i clipped the clip on a "D" ring.  This pod is nice and roomy you could problem pit 2 pairs of sun glasses in here if you really wanted it. and it a pretty stiff material you can kinda squish it in the center but at the ends where it curves it's pretty darn ridged. I feel confident when i swing my bag off my shoulder and just toss it into my car that my new sunglasses with be safe inside.