Foldable dust filtering half mask that thanks to its three-panel design, provides the functionality of a foldable mask and at the same time the comfort of a cup-shape mask; it’s easily foldable and its reduced volume makes it space-saving. It can be put easily in the pocket when it is not used. The single packaging improves the worker’s hygiene by avoiding any contact with harmful substances before the use. The elastic bands are welded by ultrasounds in order to avoid the application of metal staples which could cause annoying facial irritations. The metal invisible nosepiece is put among mask layers. In this way, the mask has no exposed metals. The structure and materials used are durable and avoid the collapse in humid environments.