Patagonia Field Pant. I ordered a pair around Christmas and have been putting them through the wringer in some serious briars. They are the real deal.
Mtwarden -I searched forever for the ideal do-all pant out East. Everywhere I go I have to bust thru briars. And it's almost what I would design. Fit is a little snug, I would round up in size. But I am built weird, if youre a skinny dude, maybe not. Only thing I would change about them is add a little more of the cordura type fabric to the back...sometimes you get in heavy briars and the best way to go through them is backwards. But for how thin and light the fabric is, the durability is top notch.
The techical hunting companies...FL, sitka et al need to put out a similar pant. Guys out East here would eat it up.
Kuiu Tiburon for hot summer weather. Attack for cooler.