(1)  Biocompatible Reticulated Foam

▪ More stable structure with thermosetting property.

▪ Uniform pore size of foam.

▪ Molecules in lower polarity, preventing diffusion ofbacteria with polarity.

(2)  More Effective Sucking Disc

▪ Structure design based on fluid dynamics, reducing blockrisk.

▪ Ensure even distribution of negative pressure to every outercavity, which can be monitored real-time.

(3) Biocompatible Polymer SemipermeableMembrane

▪ Betterisolation from bacteria.

▪ Hypoallergenic and non-irritant.

▪ More air permeability and more comfortable.