Hoods available with under the chin, nylon collar and full bib versions. Hoods with collar and full bib have an assigned protection factor (APF) of 1000. Manifold directs air over lens to reduce fogging. PA121 and PA141 are coated for protection from intermittent splash. Primair 100 Series hoods for use with Compact Air 200 Series PAPR and CF1000 Series continuous flow airline feature a comfortable headgear that directs air over the lens for cooling comfort. Triple adjustment headgear for a comfortable fit.