A mask, comprising: a connector; an anti-asphyxia valve connected to the connector; an elbow connected to the anti-asphyxia valve; a shell connected to the elbow; a cushion disposed at an end of the shell away from the elbow, wherein the cushion defines a first opening and a second opening, the first opening faces towards the shell, the second opening is away from the shell, and the cushion forms a flexible pad on an edge region thereof adjacent to the second opening; the cushion comprises a nasal contact area and an oral contact area, wherein the nasal contact area concavely forms a buffer structure, the buffer structure is an elongated structure extending from a top end of the nasal contact area towards the oral contact area along both sides, the buffer structure comprises a first buffer member, a second buffer member, and an inwardly concave surface connected to the first buffer member and the second buffer member, the first buffer member is adjacent to the first opening, the second buffer member is adjacent to the flexible pad, and the inwardly concave surface can deform to adjust a distance between the first buffer member and the second buffer member; the cushion is made of a silicone rubber, a thickness of the cushion gradually decreases from the first opening to the second opening, the thickness has a minimum value of 0.4 mm, the cushion surrounds a periphery of the first opening and concavely forms an embedded slot, the embedded slot is closely sleeved on a peripheral wall of the shell; a frame latched to the shell, wherein the frame comprises an engaging portion, an arc-shaped bridge extending from an end of the engaging portion, and a connecting end formed at the arc-shaped bridge away from the end of the engaging portion, the engaging portion defines an engaging hole and forms two pulling portions extending outwardly from both sides of the engaging hole, respectively, wherein the engaging hole is detachably sleeved on the shell; and a headgear connected to the connecting end and two pulling portions of the frame to assist in wearing of the mask, wherein when the mask is worn, two pulling portions of the frame are suspendingly placed on a face portion of a wearer and the connecting end is suspendingly placed on a forehead portion, so that the frame is not in contact with the skin of a face or a forehead. a connector; an anti-asphyxia valve connected to the connector; an elbow connected to the anti-asphyxia valve; a shell connected to the elbow; a cushion disposed at an end of the shell away from the elbow, wherein the cushion defines a first opening and a second opening, the first opening faces towards the shell, the second opening is away from the shell, and the cushion forms a flexible pad on an edge region thereof adjacent to the second opening; the cushion comprises a nasal contact area and an oral contact area, wherein the nasal contact area concavely forms a buffer structure, the buffer structure is an elongated structure extending from a top end of the nasal contact area towards the oral contact area along both sides, the buffer structure comprises a first buffer member, a second buffer member, and an inwardly concave surface connected to the first buffer member and the second buffer member, the first buffer member is adjacent to the first opening, the second buffer member is adjacent to the flexible pad, and the inwardly concave surface can deform to adjust a distance between the first buffer member and the second buffer member; the cushion is made of a silicone rubber, a thickness of the cushion gradually decreases from the first opening to the second opening, the thickness has a minimum value of 0.4 mm, the cushion surrounds a periphery of the first opening and concavely forms an embedded slot, the embedded slot is closely sleeved on a peripheral wall of the shell; a frame latched to the shell, wherein the frame comprises an engaging portion, an arc-shaped bridge extending from an end of the engaging portion, and a connecting end formed at the arc-shaped bridge away from the end of the engaging portion, the engaging portion defines an engaging hole and forms two pulling portions extending outwardly from both sides of the engaging hole, respectively, wherein the engaging hole is detachably sleeved on the shell; and a headgear connected to the connecting end and two pulling portions of the frame to assist in wearing of the mask, wherein when the mask is worn, two pulling portions of the frame are suspendingly placed on a face portion of a wearer and the connecting end is suspendingly placed on a forehead portion, so that the frame is not in contact with the skin of a face or a forehead.