code are at T*chbargains.
From what T*chbargains are saying, it seem to be combinable.
Last time I try, 2 weeks, ago, I was unsuccessful.
Wait until next week after I've ordered mine and I'll tell how some of you, and only some of you will be able to buy any real, not fake Oakley for $40, shipped, no tax. It look bleak b/c they don't even have it instock right now. Stay tuned.