Question-mark-4-512 Unknown status
The filter(s) listed in this article may contain materials that are dangerous to health
We are looking into this filter to determine its safety
Please avoid using these filters as they may be dangerous to health.

The T.35 filter was the standard small filter of the Italian army during the Second World War.


Spasciani T.35 filter



Two Pirelli T.35 filters

The T.35 filter was a brown-painted metal box containing a layer of particulate filtering material made of resin-impregnated wool and viscose rayon at the bottom and a layer of activated charcoal, pumice and other blocking substances at the top. Before being opened, the bottom intake is covered by a small sheet of waxed canvas and the top is closed using a 40 mm lid, with all of this bound with a string closed using a small lead seal. After the filter has been opened for the first time, it could be closed again using the 40 mm lid and a small rubber seal attached through a string to the filter.


T.35 filter on a T.35 mask


T-35 Filter02

Two T.35 filters, on the left the one made by Pirelli, on the right the one made by I.A.C.

The T.35 filter has three main markings:

  1. The two symbols on the top near the filter thread are the manufacturer's logos.
  2. The inscription on the side is the name of the filter. Note that the font changes between some companies.
    Ed0fbc4120ee9910ed23b3b12ddf1696 orig

    Sealed bottom of a T.35 filter

  3. The inscription at the bottom is the date of production.
Community content is available under CC-BY-SA unless otherwise noted.