As the subject has returned to OA, I thought that some may like to know what I purchased regarding my request for mask info. I contacted many beekeepers before contacting 3M and the following is what was recommended for vaporising. 3M 6800 full face mask (CAN$123) Organic vapour cartridge 6001 ($9 pr.) Pre filter 5N11 ($3 pr.) and 2 plastic retainers at $1.75 each. I haven't used them yet ( haven't wrapped the hives yet either!). But 3M said that the full face protects better than mask and goggles and is more comfortable. With the recent remark about beekeeper deaths, I feel that I am not exaggerating regarding protection. Peter -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---