Poly material will not stick to cover inserts or materials stored inside – archival safe for all documents including photos. Clear, non-glare overlay for customization on all three sides. Back mounted round ring metal with dual opening and closing triggers allows sheets to lay flat and provide a clean, professional spine. Horizontal pockets on inside front and back covers. Cover boards made from 100% recycled fiber with at least 98% post-consumer fiber. 6 pack, 225 sheet capacity.