100% cotton or sponlace non-woven (30g/m2,70% viscose,30% polyester) ◆ high absorbency and soft ◆ cotton yarn of 40s, mesh of 17, 20, 24 threads/cm2 ◆ with or without X-Ray detectable threads(60% BaSO4,blue color) ◆ with or without elastic ring inside ◆ round form, cap form , flat form and oval form ◆ quality standard: Ph.,Eur.,DIN61630,BP1993 & USP