such out of breath

[faryan]

I would appreciate if you could take a look at the sentence below and drop a line to let me know if the sentence sounds right to you as a native speaker? Do you consider "out of breath" as a noun or an adjective in this sentence?

He was such out of breath, he couldn't speak at first.

 

[alexanderfinn]

The sentence should be, 'He was so out of breath .....'

'Out of breath,' behaves like an adjective.