●HEAVYWEIGHT - Extra-durable with heat-welded seams to withstand continued turning and flipping of pages over time ●DIAMOND CLEAR - Acid-free, cling free, non-yellowing archival quality polypropylene plastic sleeves for a clear view of your photos ●25 PACK - 2-up 5" x 7" Photo Album Refill Sheets for standard 3-ring binders, each with 2 horizontally-oriented top-loading pockets to fit up to four 5" x 7" photos per sheet (2 front, 2 back) ●TOP-LOADING - Easy and convenient front loading pockets