But that's all made of plastic. "Breathable" just means that air can pass through the material. Nylon and polyester are plastic, but they're spun in to threads and woven like cotton. They're used to make running/cycling jerseys because they are breathable, but don't absorb moisture.
The "cloth-like" material on the main outside part of the diaper is produced by spraying hot plastic through tiny nozzles, blowing them cool, and bonding them to a base material, such as a polyethylene backsheet.
The manufacturing process involved in using a PE backsheet and adhering a "cloth-like" non-woven plastic layer MUST be more costly than simply using a PE backsheet. The question is whether this method actually uses any less plastic, and if so, whether the savings in material costs are greater than the added expense of fabrication.
That's polyethylene film. It's used to make the diaper waterproof. It's usually a lot thinner in diapers with a cloth-like backing, which makes the diaper more flexible.
I did once buy a batch of diapers that had the fuzzy backing AND a full PE backsheet. They actually worked pretty well -- better than any other cloth-like diapers. But... I just prefer plastic-backing. It was ages ago when cloth-like backing was a "new thing"...
But yeah -- plastic-backed (i.e. PE-backed) diapers are the best! :smile1: