What is super visa insurance?

Super Visa applicants require coverage for emergency medical costs in case an unforeseen injury or illness happens while they are visiting Canada or are on a side-trip outside of their country of origin. Canadian Super Visa applicants must submit a proof of purchase of private emergency medical coverage that meets the following requirements:

a) Issued by a Canadian insurance company.
b) Valid for at least one year from the date of entry.
c) Provides at least $100,000 in coverage
d) Offers proof that the medical insurance has been paid for.

Source: Super visa (for parents and grandparents) - Government of Canada