ES fiber is produced by composite spinning technology with sheath-core structure, sheath is PE, and core is PET or PP. During heat processing, sheath components are melted and adhered to stick fiber together, but core will be there to keep good resilience and shaping. It's used for nonwoven fabric, applied to medical (facial mask), hygiene products (baby diaper, women sanitary napkins, filter industry, etc. Functional ES Fibers:� -- Hydrophilic -- Durable Hydrophilic -- Hydrophobic -- Anti-bacterial -- Dope Dyed Colors