Nasal Mask, Large Adult, French Vanilla, Single-Use, Disposable, 12/pk (33034-14)Mask in mask design draws excess gas into vacuum, reducing ambient N2O. Soft inner mask creates desirable nasal facial seal and seal can be seen through clear outer mask. Low profile expands clinical field of view and provides easier access to the mouth. Latex free material protects patients and staff who have latex allergies.