uvex silv-Air c 2310 FFP3 particle mask, with exhalation valve, size Luvex silv Air c 2310 FFP3 particle mask, with exhalation valve, size L Acc. to EN 149: 2001+ A1: 2009. Form fitting particulate filtering mask Flexibly adjustable nose clip for comfortable and secure mask fit FFP1 and FFP2 masks have an all round headband and a comfortable sealing lip on the nose for reliable sealing FFP3 masks feature a four point headband attachment and a soft, all round sealing lip for optimum comfort and especially secure and