另一种类型的口罩是预先成型的，靠一条松紧带绑在头部，并且在鼻梁处可灵活调整。
巴卡拉头盔的开放式面罩最早是为一名“严寒天气”克隆人坦克驾驶员设计的。
1·Aerosolized drugs delivered with a facemask may inadvertently deposit on the face and in the eyes, raising concerns about cutaneous and ocular side effects with these drugs.
雾化器给药用面罩释放的方式可能不注意地沉积于脸部和眼部，提高这些药物的皮肤和眼部的副反应。
2·A football player counts on this when he trusts that his facemask won't shatter.
橄榄球运动员据此相信他的面罩不会裂成碎片。
3·The force of this surging water is enough to rip your facemask off.
高涨海水的力量足以冲掉你的面罩。