It depends which unit you are with and who they source their gear from. I have seen the British S10 and the US M40 do the rounds. Anything NATO based can technically be sourced.
M65 Gas Mask.
They use the military varient of the Gp7 gas mask.
if you are in need of a gas mask, you BP isn't an issue. the mask may inhibit your ease breathing but it will not directly affect your BP.
Store your military gas mask as follows: Use the mask faceform to prevent damage to the mask in storage. Do not store or transport the mask under heavy or sharp objects. Do not store the mask where it could be exposed to extremes Always clean and thoroughly dry the mask before storage.
in Australia we use gas,oil, and coal.
Dimensions of a gas mask box will vary depending on its use. If it is short duration such as an escape hood; which will be about 6 inches by 6 inches by 2 or 3 inches. If it is a mask with accessories it will be about a 1 foot cube.
they put it on like a Halloween mask and breathed normally.
Hold your breath or use a gas mask DONT date him/her
The primary function of a gas mask is to prevent toxic gases or poisonous material from entering the lungs and attacking the person. It does not provide its own oxygen supply, but filters out the particles. They can also protect the face from contact poisons or gases.
In the single player campaign the player cannot use a gas mask. It is completely useless what so ever. It is only cosmetic at the least. In multi player, the player can be seen wearing a gas mask from a third-person perspective if they have a certain primary weapon equipped, such as an MP5 sub-machine gun or a W1200 shotgun. The player on the SAS team will be wearing a dark gas mask and helmet on their head, whilst on the Spetsnaz team the player can be seen wearing only a gas mask on their head. It is most likely the Russian made GP-5 gas mask.
Emergency Procedures and Bomb Shelter Evacuation and Use of Gas Mask and Shelters.
They will put a tube in your nose or a mask over your mouth. Usually, they will use a tube in the nose, but they could use a mask. The sleeping gas will come through one of those. Soon you will fall asleep and likely will not remember that moment in time very clearly after you wake up.