It takes the M 17 idea with its inside filters, mounted in cheek pockets of the mask but the general shape is typically like the majority of Soviet masks, it is designed around the hooded mask principle.

The hood facepiece is made of soft grey or black shaped moulded rubber, including cheek pockets for two lightweight filters,model EO 19E

Two small eyepieces ( 40 mm dia.) located on a near flat plane allows to uses binocular optical instruments, but has a poor lateral vision. An inside rubber rims around each eyepieces, allow to use optical corrective glasses. 

An inside half mask allows to reduce the moist on the eyepieces

 A moulded plastic frontpiece includes a voicemitter and a double exhale valve.

A small bag worn on the soldiers belt complete the mask