I carry a Kershaw G-10 handled / s30v combo-edge blade leek (model 1660G10ST). There are certainly thicker-bladed more robust "combat" folders out there, but it's very lightweight (less than 3 oz) and doesn't make a big bulge in my pocket; it's comfortable to carry, as fast opening as an automatic, and isn't so big as to scare the sheeples that I work with.