I use a HPG bag a lot for carry and while hunting. When hunting I wear bino's over the HPG with a Rick Young bino harness/cover. It works very well for me. If it's hot I will sweat, but I'm going to do that anyhow. One thing I like about wearing the bino's over the HPG is it offsets the bino's from my body a bit. I've had the bino's fog when against my body if I had the lenses uncovered.

I use the HPG way more than I ever thought I would. It's just so handy.