I have one. This is really nice pair of pants. They fit one size down from Tech 1.0 and 2.0. Pretty much TTS unless you want bit relax get one size up.
That's weird.
I have 2 of each grey, dark heather, and black tech 1.0 and 2 of grey in tech 2.0.
2.0 version is slightly bigger (not much noticeable) than tech 1.0.
I would keep in same size unless you gained weight or you stretch the tech 1.0 by wearing them a lot or something.
I don't know where you are located but these were at NTNY and some other footlocker stores in NY. I also saw one in Miami South Beach Footlocker I believe. Take that style number and give it call.
Hm. I wonder. When I ordered 2 pairs of Nike Flyknit Racer off Nike.com they weighted 4 lbs. I know they weight less than Pumas, but hope they shipped it same package.