The 16x20x1 MERV 8 pleated self-supported air filter has over 140 adhesion points between the media and the die cut frame. The inside of the frame is completely coated with water-repellent adhesive to ensure a solid bond at all points of contact with the media pack. The pack is sealed inside the frame and pleat tips are bonded to the stabilizers and diagonal support members. This prevents movement, bunching, and collapsing during operation, which can often cause alternative filter products to fail prematurely. With no metal wire backing to warp or deform, along with a single-piece, heavy-duty beverage board frame and rugged self-supported pleat technology, the XTREME Plus filter is capable of maintaining its performance and structural integrity in wet or humid conditions. This saves users time and money that is often wasted on replacing damaged wire-backed filters.