16x20 FoldFlap design allows for easy and scratch-free insertion and removal of prints Crystal clear polyester allows for safe viewing of material without direct handling 3 mil polyester is completely archival and safe for long-term storage Self-locking design holds material securely in sleeve PAT passed 25 sleeves per pack Tips Remember to use gloves when handling negatives To remove dust use Falcon Dust-Off compressed air or Static Wisk To safely clean negatives or prints use archival PEC-12 with PEC PAD