ClearView Classic Masks Mask-in-mask design draws excess gas into vacuum, reducing ambient N2O. Clear outer mask shows patient "breathing through nose" (fogging appears in mask). 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. Low profile keeps patients from adjusting mask to see operatory TV monitor and staff activities. Single-use minimizes cross-contamination; saves staff time. Latex-free material protects patients and staff who have latex allergies.