400 Tyvek CD / DVD Disc Sleeves With Flap & Window #CDIYWF - Tyvek is Tougher Than Paper! 5 1/8" X 4 15/16" With a 1 1/2" Flap. Features a "Window" to See the Discs! Great for Organizing &amp; Storing Discs! TYVEK IS MORE DURABLE THAN STANDARD PAPER SLEEVES!