Columbian CO828 10x13-Inch DuraLok Security Tinted White Envelopes, 100 Count Envelope engineered for excellent protection with an upscale interwoven textured appearance. Features advanced multi-layer construction which provides excellent moisture, burst and tear resistance designed to endure shipping & mailing stresses. Security tinted for added privacy and confidentiality. Convenient and secure self-sealing Grip-Seal closure. Simply peel off release strip and press down for a quick, secure seal. White Duralok material. Open end closure. 10" x 13" 100 envelopes