ctacker,
Unfortunatly, this is not an option as of yet. Speedglass sells a hard hat equipped with hardware for use with thier regular hoods, but it can not be used on the adflo effectively. It will raise the hood up and not allow for proper sealing of the system. Speedglass has received inquirys of this nature and they advised me that they are looking into this for the future, but at this time, nothing.
BTW I verified this again today.
Depending on the level of air flow protection one is needing, it might be possible to modify something to work, but this may not be advisable if one needs this hood for more than low level air purification protection.
Let me clarify: I am refering to modification of the air flow seals and NOT the hard hat. LOL :-) You might be able to make something work to suit your needs but it appears that it will not be an off the shelf item.
Let me know if you need contact inforation for them, and also if you do find something to work.
jrw159