Paperback with matte finish. Book lies flat when open. 8.5”x5.5”. The bound specialty book contains approximately 22 + cover pages. The NAUI Full Face Mask Specialty Booklet is the perfect review material with an intent to be used as a supplemental training component. This guide is an accessory to the comprehensive NAUI Full Face Mask course and acts as a nice reassessment after completing a course in diving skills and techniques. While this booklet does not take the place of actual training by a qualified and experience full face mask instructor, is does provide you with an understanding of the requirements associated with effective full face mask use. It offers a general introduction on the advantages and disadvantaged of using a full face mask; how to inspect the unit before operation; how to properly don, clear, and doff the unit; and how to care for and maintain a full face mask.