What is X-Pac™ fabric? And, why do we sell it? Like DCF (Dyneema Composite Fabric), X-Pac™ has its roots in the sailcloth industry where most ultralight, ultrastrong, waterproof fabrics are born. Developed and distributed by Dimension-Polyant, X-Pac™ is a composite fabric comprised of multiple layers of fabric laminated into a single sheet of fabric. The layers in X-Pac™ consist of a Nylon, Cordura, or Polyester face fabric, an X-PLY™ mesh, a waterproof film and a taffeta backing with a water-resistant coating. This technology makes X-Pac ultralight, ultrastrong, abrasion and tear resistant, and highly waterproof. In short, it’s perfect for making outdoor gear, and we think you’ll like it!