Uvex silv air c ffp123 pre formed masks withwithout valve white uvex 8732100 this pack of 20 pre formed masks from uvex have been designed without a valve and include the following features comfort sealing lip the soft sealing lip guarantees a secure comfortable sealed positioning of the maskcomfort nose clip the mask is fitted with a high quality nose clip making it individually adjustabled labelling the mask has undergone additional dolomite dust testing and therefore affords