Regular specification: 20S/1,30S/1,40S/1 ; 20S/2,30S/2,40S/2 1.High brightness,good yarn strength, 2.Strict quality control 3. ... ,in good uniformity,soft,comfortable to wear. Regular specification: 20S/1,30S/1,40S/1 ; 20S/2,30S/2,40S/2 viscose spun yarn