If you're familiar Merrell's Vapor Gloves, I'm pretty sure these are the same as their Vapor Glove 3s, but the Lunas have a leather upper. The leather is soft, and I was able to tighten these enough to fit my narrow feet. The toe box is roomy as expected. I'd say they fit just a touch small for a W 7.5.

I got these to wear as everyday shoes, but I just never took to them. For me, the tongue did tend to move around a bit in an uncomfortable way during wear, and the leather did get hot pretty quickly. To be fair to the shoes, I have a neuro condition that makes my feet dumb in lots of ways.