Where does this come from, and can I check it?

A second layer with open gaps stops the wind turning the umbrella inside out. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a everyday life fact?

Yes. It sits on the Everyday Life shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Vented umbrellas let gusts pass through the canopy

A second layer with open gaps stops the wind turning the umbrella inside out On a vented umbrella the canopy is split into an upper and lower layer joined at the ribs but open along the seams. A gust can escape through those openings instead of filling the canopy like a sail, which greatly reduces the force that flips it. The trade off is a slightly heavier canopy and a little rainwater reaching the vents. It sits in Mondo's everyday life collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Encyclopaedia Britannica

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Tags: umbrellas, wind, design

Vented umbrellas let gusts pass through the canopy: the short answers

Where does this come from, and can I check it?: A second layer with open gaps stops the wind turning the umbrella inside out. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a everyday life fact?: Yes. It sits on the Everyday Life shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.