Olive Green 511 Tactical Pants. I swear by them. I wear the tan for work. Never had a problem.
True story: The PLC approached me and said they were making jeans the official uniform pants. I did my usual questioning to guide them and ask them what their Handbook said about the official uniform. Well we kind of went round and around with my questions and their answers not quite hitting the mark. I never told them what they had to do or should do, I just asked the questions that guided them to the right and wrong of their proposals. Kind of a weird debate really.
They though about this for awhile came up with plans of how to get away for the BSA official pant. They approached me and made a proposal to use the OD BDUs that they could get for $21 at the surplus store. The color was spot on with the BSA pants, which made them hard to see a difference at a distance. However, the BDUs had the advantage of double fabric in the same the seat and knees like tactical pants, huge cargo pockets, and they were adjustable 4 sizes. That meant a new scout could grow into his pants for at least three years. They looked nice but were perfect for outdoor activities
Anyway, since the hang up was the word "Official", the PLC said they would propose their reasoning for switching to BDUs to the Council and ask that the BDUs be accepted as "official" at scouting events. I thought that was a great idea and a great practice of proposing change through an official channels as apposed to defiance. I did not think the council would agree. Low-and-Behold the council did agree and our troops new official uniform pants where the OD BDUs.
The scouts liked the BDUs so much that many of them wore the pants to school. There was a shorts version of the BDUs that became common in our troop as well. Our troop used the BDUs for about 10 years until the BSA came out with the zip-offs.
I still have a couple of pair of those BDUs in my closet next to my official BSA pants. LOL