China Non-Medical Disposable Face Mask Wholesaler introduces the difference between cup masks and foldable masks:

Common masks are cup-type and folding-type masks, and the only difference is the cotton applied between them.

Cup-shaped masks usually use needle-punched cotton, relying on pre-molded structures to support filtered, shaped materials. The raw material of needle-punched cotton is polyester fiber, which adopts needle-punching process, which has the advantages of light weight and easy shaping. Needle-punched cotton also has the functions of filtration, anti-low toxicity, and deodorization, and also has the advantages of ventilation, comfort, hygiene, convenience, safety, and beauty. Needle-punched cotton can be made into different styles to make cup masks of different sizes. It can be made into an arch shape to ensure a good fit with the shape of the face and retain a certain space for the wearer to feel comfortable.

Folding masks are usually made of hot air cotton. Hot air cotton has a good effect of keeping warm and protecting, and has high loft, large elasticity, soft texture, strong warmth retention, good air permeability and water permeability, and mainly plays the role of thermal insulation, moisture-proof and moisture-proof. . Folding dust masks have better fit than cup masks, can be individually packaged, and are easy to carry when not in use, which is very convenient.