Warp knitting is the use of multiple yarns for superior fit and performance.
Warp knit fabrics don't have a natural stretch. The use of spandex makes sure the content of elasticity, helps control the compression for the ultimate performance.
Warp knitting a compression product is superior to using circular knit which has natural stretch. It makes it hard to maintain the correct level of compression. Circular knit fabrics don't offer the same structure and durability, they may potentially run if caught. Many yarns are used for warp knitting to offer a stronger fabric. Warp knit offers moisture management, this feature runs through the loops of the garment.