20 X 3m 9310 Prem Dust 9310 The advanced 3panel design of the 20 X 3m 9310 Prem Dust 9310offers greater comfort, easy communication,improved wearer acceptance. Individually packed to avoid contamination, the 20 X 3m 9310 Prem Dust 9310 arelightweight & foldable for easy storage. Centrally positioned CPC valve prevents heat build-up. Soft cover web on inner panel ensures greater comfort on the skin. EN149 FFP1S (APF:4 x OEL).