Possible responses include:
His breath
The clouds
A woman's attention
A breath
ice
Breath is light as a feather and can not be held for more than a few minutes.
his breath
A Breath
His breath is as light as a a feather but the strongest man can not hold it for more than a few minutes.
Breath.
Your Breath!
Well it is obviously air
Your breath !
Fire, or a lit match, or candle.
Breath, as if you try to hold it, you can suffocate, and its so light.
a breath
God.