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[Deep Dive 25 Shorts] Diapers Can Breathe?! The Real Reason

A diaper is waterproof — that's the whole point. Yet a baby's bottom somehow stays dry and soft inside. How can something that locks water in also 'breathe'?

The secret is a thin film wrapping the diaper's outer surface, full of tiny invisible holes. Diaperman's Deep Dive Ep.25 Short breaks it down in 60 seconds.

The secret: a thin film full of microscopic holes

Zoom in on a diaper's outer layer and you'll find a thin film covered in microscopic pores — a breathable membrane. It looks like plain plastic to the naked eye, but under a microscope, countless tiny holes are each doing their job.

Smaller than a droplet, bigger than vapor

It all comes down to size. Each hole is smaller than a liquid water droplet but bigger than water vapor. So liquid like urine can't squeeze through and leak out, while the moisture building up inside escapes freely as vapor. One simple size trick that blocks water and releases humidity at the same time.

Locked in, yet dry inside

That's how a diaper can keep pee locked in while continuously venting moisture — so a baby's skin stays dry instead of getting soggy, which also helps prevent diaper rash. Waterproof and breathable sound like opposites, but one thin film makes both happen at once. Have you ever touched a diaper's outside and been surprised it felt dry? Tell us in the comments!

Watch the Short

Watch the full breathable-fabric story in Diaperman Deep Dive Ep.25 on YouTube!

3 witch costumes in this video

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πŸ€– Concept scenes are AI-generated and do not guarantee real product performance. This video was AI-generated.

#Diaperman #Diaper #Breathable #Parenting #MaterialsScience #Shorts

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