X-Pac and Dyneema are two of the most recognizable names in premium technical backpack fabrics, but the comparison is often oversimplified. X-Pac is a broad family of laminated pack materials. Dyneema is an ultra-high-molecular-weight polyethylene fiber that can appear in several very different constructions, including film-based Dyneema Composite Fabric, woven-face hybrids, and newer fully woven composites. Comparing only the brand names can therefore produce...