I totally agree with Quilt E. Your health comes first, and since you are doing this as volunteer quilting for others, they need to be considerate of you and about your health issues. If there are those who can't accept the fact that you do not want to quilt their quilts because of pet hairs and dander, tough, let them get their quilts done else where. Take a stand and let everyone know your problems and don't give in, you should NOT have to wear a mask or do anything extra for these folks and their quilts. I have had bad allergy issues all of my life, so I know what allergy problems are, most of mine are to many plants, and inhalants. I would never impose on those who ha such allergies if I knew ahead of time what their problem was. I don' have indoor pets, but I know many who do, and there is no such thing as an allergy free home with indoor pets- all pets shed. Good luck and I admire you for your generosity as a longarmer.