Safe for all documents including photographs, the acid-free poly material will not stick to cover inserts or materials stored inside. Clear overlay showcases customized title sheets on the front cover, back cover and spine that you create. Dual opening and closing triggers latch and unlatch the round metal rings keeping your documents safe and secure. Hidden rivet construction adds to the clean, professional appearance. Horizontal pockets on inside front and back covers expand binder's storage capabilities for loose or unpunched sheets.