Why foryou npwt foam dressing foam is the most commonly used dressing in negative pressure wound therapy. foryou npwt foam dressing is appropriate for a wide range of wound types. The design of foryou npwt dressing makes it much easier for healthcare givers to apply. Designed for healing open pore structure (400 600 microns) helps provide uniform distribution of negative pressure at the wound site hydrophobic construction helps exudate removal