There are myriad reasons for wearing a face mask. In China and parts of South East Asia, they're commonly used as protection against alarmingly poor air quality, while in Japan and elsewhere they help reduce the chance of catching airborne diseases such as flu. Helpful as they may be, they're not the most conducive to maintaining everyday social interactions. Designers Simone Rebaudengo and Paul Adams' Unmask is an experimental prototype that aims to change that by allowing wearers to show emotions through their masks.