I learned about Drop Zone Tactical (DropZoneTactical.com, DropZoneTactical.com/clothing/clothing.php) on ETS a few years ago.

I spent a lot of time talking myself into trying them, since they are quite expensive for rugged wear clothing. I am glad I did. Now I wear nothing else until it is time for a truly dress-up occasion.

They are cargo pants, so that may affect your plans. The fabric is 12-ounce per yard 65/35 poly cotton blend. The pockets use the same fabric inside and are deep enough that I rarely use the cargo pockets. Knees and seat are both double layer. Waist is adjustable.

I have them in navy blue and I find that the dark color deemphasizes the external seams of patch pockets and double layers. I have simply added a blazer for events one step more formal than casual Fridays. (The navy blue is quite a bit darker than the example on the web site.)