The 1st end (28) and are suited for the sealing up contact to the face of the user the 2nd end (30,104,126,134,194,218) and with of the 1st end and the 2nd end which are suited for the connection to the facial sealing up body support section stretching the side wall (44,108,129,129 and 196) which is done the mask (10) which uses the facial sealing up body (14,100,120,130,170,190,210,240) and its facial sealing up body which it has. The 1st end, the 2nd end, the side wall or these each combinations are formed from the elastic material which at least possesses 1000% growth rate. It is desirable to form the facial sealing up body from integral part of the elastic material.< Selective figure >It is not顔面密封体支持部への連結に適する第1の端部(28)と、使用者の顔面への密封接触に適する第2の端部(30,104,126,134,194,218)と、第1の端部と第2の端部との間に延伸する側壁(44,108,129,129,196)と備える顔面密封体(14,100,120,130,170,190,210,240)及びその顔面密封体を使用するマスク(10)。第1の端部、第2の端部、側壁又はこれらの何れかの組み合わせは、少なくとも1000%の伸び率を有する弾性材料から形成される。弾性材料の一体部品から顔面密封体を形成するのが好ましい。【選択図】なし
