Sheet masks are a popular way to hydrate the skin, but they’re definitely not one size fits all. “Most of the time, there’s always something off about how a sheet mask fits but the perfect fit is only ...

Fig. 1. Given (a) the scanned face model of a subject, we develop an optimization-based approach to design (b&c) a PAP mask cushion that fits the face model. (d) The designed mask cushion is ...

In a new study, researchers used principal component analysis along with fluid dynamics simulation models to show the crucial importance of proper fit for all types of masks and how face shape ...