There
has been a lot of discussion about the US M40 series gasmask. First the
development of a new mask in coorporation with Canada did not become successful.
Second the sillicone material used as a basis does not protect against
some agents. Perhaps that is why there is already a new mask developed.
However the design look is based on a common look (two eyeglases, filter on side), but still is a very remarkable one. The green basic mask is covered with a black second skin. I have both the M40 and the M40a1. The major difference is the attachment of the hood: the M40 has the hood attached to the second skin, where the M40a1 uses a separate hood, like the MCU mask series.
Another favourite.
M40a1 without second skin
M40 with hood
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