I believe it's gray/black G10. It's a really nice little knife. Blade is ~3" long, ~.75" from top to bottom so it's slim. Slight drop point to help with control.
It can't be seen in the pics but I like the way Mr. Olt rounded the grips. The grip ends up still being slim but with enough purchase and length be comfortable, no sharp edges. I'm a "finger holder" when using rather than a "handle in the palm holder" so a big hand filling grip with many grooves isn't a good fit for the way I cut. This one is nice and neutral so it's as comfortable to hold inverted as it is right side up.
