The unique pleated filter technology offers extremely low breathing resistance. This FFP3 mask has a full face seal and adustable strap and clip. The ActiveForm? seal automatically adjusts to different face shapes and movements to give a secure fit. The DuraMesh? shell increases shape retention and durability The Ventex?-valve reduces moisture and heat inside the mask. AIR + FFP3 NR D valved EN149:2001 + A1:2009