The 3M™ Hoods can be used in low pressure positive pressure. The wearer has lightweight, comfortable protection from the elements. The incoming air can be cooled by as much as 50 degrees F. This allows the wearer to be comfortable, safer and breath easier. The hoods are available in Tyvek® and Tychem®SL. Features include wide-view lens which allows safety glasses to fit under hood. No fit testing is necessary. Hoods can be worn with beards.