I prefer clear malleable plastic masks with soft air-filled cuffs and a stepped or contoured shell for lower dead space and less fatigue for the hand. A range of sizes should be available.
Punctured cuffs can occur.
Use your spread lower fingers to span the length of the patient's mandible and its inferior angle. Fit the nose-notch of the mask's cuff over the bridge of the patient's nose. Spread and mold the malleable portions of the mask to flare and fit against the patients face. Roll the mask into contact with the face. Open the mouth slightly and bring the lower portion of the mask's cuff to rest in the hollow above the chin's bump and below the base of the teeth.