Pic-Pock Archival Sleeves are Engineered with Acid-Free Cast Polypropylene (CPP) with No BPH and No PVC, to Provide Premium Archival Preservation for Your Most Treasured Items! Don't Settle for Standard! Crafted with 200-micron CPP, our "Pic-Pock" Sleeves Offer Double Duty Protection with Twice the Thickness of Most Standard Options Whether Using for Display or Storage, These Crystal Clear Sleeves Provide Long-Term Preservation or Enhancement for Your Display Albums! Simply Remove the Optional Adhesive Strip for Sleeve Closure or Attachment onto Your Display Album Pages Our Sleeves Feature a Removable Adhesive Option, Allowing Easy Layering on Album Pages to Maximize Space for Additional Photos You May Wish to Display! 4x6" Sleeve Bundle Contains 50 Sleeves: 25 - Portrait (Vertical) Format Sleeves, 25 - Landscape (Horizontal) Format Sleeves Keep your memories preserved safely with "Pic-Pock" Archival Sleeves by Collective Impressions! Featuring double the volume of most standard options, our sleves are crafted with 200-micron CPP for archival preservation of your most treasured photos, cards, documents & other memorabilia. The optional adhesive strip provides a sealed closure for long-term preservation, or easy attachment to album pages for enhanced displays.