When sourcing military-grade apparel, prioritize high-tenacity fabrics such as Cordura nylon or Ripstop cotton-polyester blends (typically 65/35 or 50/50 ratios) to ensure tear resistance. For combat uniforms, verify the Infrared Reflective (IRR) coating capabilities, which reduce the wearer's visibility under night-vision devices. Additionally, ensure the use of reinforced stitching (triple-needle) at stress points like crotches and knees, and specify YKK zippers or high-grade hook-and-loop fasteners for operational reliability.