MOLLE (pronounced: Molly) is an acronym that stands for "modular lightweight load-carrying equipment." It is a gear attachment system used by the U.S. Military and other military forces around the world. The MOLLE system includes PALS webbing. PALS stands for Pouch Attachment Ladder System, and it's the horizontal grid of repeating  fabric webbing strips (or laser cut openings). According to the PALS standard, these strips are spaced 1 inch apart, and sewn to the backing at 1.5-inch intervals. We use MOLLE / PALS on many of our bags to allow for easy, modular attachment options.