Narrative:

Cabin crew reported odor; fumes of a chemical nature very strong in back of plane. Pilots smelled 'dirty socks' and donned oxygen masks. We determined it strong enough to return to ZZZ. We were vectored back to an arrival and landed without incident; and did not declare an emergency.

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Original NASA ASRS Text

Title: A320 flight crew reported chemical fumes in cabin noticed by flight attendants. Subsequently; odor was detected in the flight deck. Flight crew executed a precautionary return to departure airport.

Narrative: Cabin crew reported odor; fumes of a chemical nature very strong in back of plane. Pilots smelled 'dirty socks' and donned oxygen masks. We determined it strong enough to return to ZZZ. We were vectored back to an arrival and landed without incident; and did not declare an emergency.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.