I was thinking we got a bag/box in the mail with our bib number, race day info., etc. Do we not?
No you won't receive anything in the mail.
There was an athlete email sent on Aug. 12 with lots of information including a link to the Athlete Guide.
You will received your bib and timing chip and such at athlete check in.
I never got an email or snail mail, but it may have been treated as spam.
I do remember that participants received a free package of Ironman Perform last year in the mail.
Your race bid, transition bags etc. you'll get at athlete check in at the Galt House.