After trying many different brands of tactical pants I have had the best luck with the Propper brand Tactical Pants.  Many of the other brands rip out in the crotch within the first couple months, the Proppers' are heavy stitched and have out lasted everything else.  The elastic band is great, after 13+ hours a day wearing a duty belt it is a much needed comfort.  The double fabric knees are great when using shackel ports all day, (concrete gets hard on your knees!) The teflon coating is great, not only does it keep things from clinging to your uniforms but adds a bit more protection from water and some slash resistance (they don't catch and tear like the 5.11 or the flying cross.)  I would definatly recomend these to any other Correctional Officers out there, but keep in mind they do run a little small I usually order the next size up from what i would the other brands.