It has red lenses with blue and gray on the mask part.
Role in series
Patrick tries to use a gas mask to prevent the smell of perfume while walking through the perfume department with SpongeBob. However, one of the workers pulls it away from his face and sprays some perfume on him.
"No Nose Knows"
Patrick uses it to prevent the smell of Squidward's cheese from getting to him to be safe.
SpongeBob uses it to prevent catching Squidward's disease.