MASK

To provide a user-friendly mask.SOLUTION: A mask 10 comprises a body part 20 which covers the mouth of a human body and a switch structure 40 capable of switching a state of the body part 20 between a first state and a second state. In the first state, the human body and a lower portion 20A being located below the portion of the body part 20 covering the mouth can be separated. In the second state, the lower portion is in contact with the neck or a portion of the face being located below the mouth in the human body, so that an air flow between the outside and a space located between the mouth and the body part can be inhibited more than in the first state.SELECTED DRAWING: Figure 4 【課題】使い勝手がよいマスクを提供する。【解決手段】マスク１０は、人体の口を覆う本体部２０と、本体部２０の状態を第１状態および第２状態との間において切り替え可能な切替構造４０と、を備える。第１状態は、本体部２０のうちの口を覆う部分よりも下方の下方部分２０Ａと前記人体とが離間可能である。第２状態は、下方部分が人体のうちの顔のうちの口より下方または首と接触して第１状態よりも口と本体部との間の空間と外部との空気の流通を抑制可能である。【選択図】図４