The facepiece was made with stamped rubber of varying colours. It has two "unbreakable" glass eyepieces. The exhale valve is in the front and it's inside a phonic device made up by the exhale valve, a net cover for the valve, the trumpet, a net cover for the inside of the trumpet and the housing, which was an heavy cylinder with a thread to screw on the trumpet, which held the other pieces in place. The filter intake is at the bottom, and over it, there are the inhale valve and the tissot system, which helps to prevent fogging. The mask uses the standard Italian five straps system, four of which are elastic.
The mask came inside a T.35 satchel, which sometimes had a small pocket to put the soldier's tag, and it was marked with an "F" to show the content of the satchel and the register number. The filter was usually marked with the standard navy marking paper. Depending on the manufacturing company, the kit would be provided with a stick of anti-fogging soap.
The phonic version of the T.35 was made in a slightly different manner by every company producing it, especially I.A.C. The ones made by Pirelli, Spasciani, and S.I.G.L.A. are very similar to the original design, in fact, because of the large size of the phonic device there is very little space inside and that makes the tissot system very necessary, as the mask would fog up easily without it. Also, Pirelli F.T. 35 has a larger trumpet, unique to this phonic mask in particular. The masks made by I.A.C. are instead quite different from regular T.35 masks, as they have a more prominent oral and nasal cavity to accommodate the extra space taken by the added features.
I.A.C. and Pirelli intake threads side by side. Note that the I.A.C. one has space for a rubber seal (put inside only when using german filters)
I.A.C. (left) and Pirelli (right) phonic T.35 masks. Note the prominent nose and smaller trumpet on the I.A.C. model
Two phonic devices dismantled, with the upper pieces from I.A.C. and the lower ones by Pirelli