The mask was purchased from a supplier of Venetian masks and adapted: the
sensors were installed in the end of the beak with a cable running back up to
the side of the face and down underneath the cloak to the computer: the sensor
unit is attached to the mask with velcro: a plastic seal was fitted into the
beak to close off the end of the beak from the performer's breath (it was made
from a plastic bag and some adhesive velcro): new airholes were drilled above
the seal: a stronger elastic headstrap was attached to the mask.