When evaluating military embroidery, focus on thread density and stitch count; high-quality patches should have a 100% embroidery coverage option for durability. The base material is typically twill, felt, or velvet, with polyester or rayon threads being the standard for colorfastness. Ensure the edges use a merrowed border to prevent fraying or a heat-cut/laser-cut edge for intricate shapes. For functional use, verify the backing type, such as Velcro (hook and loop), iron-on (heat seal), or adhesive, depending on the final application.