A respirator adapted to facilitate ease of donning and comfort during use comprising one or more of an adjustable or elastic strap that facilitates ease of donning and comfort during wear; and/or fasteners that are easy to use and that facilitate ease of donning and comfort during wear; and/or respirator shapes that facilitate the wearing of eyeglasses with said respirator; and/or bellows-type, pneumatic, or other such components, associated with said respirator, that are adapted to promote adjustability of the fit of the respirator.
