also: フリー・パス
free pass
A pass granting free access or unlimited use, such as for transportation, events, or facilities.
このフリーパスがあれば、1日中電車に乗り放題です。
With this free pass, you can ride the train as much as you want all day.
I bought a free pass for the amusement park.
I got into the museum with a free pass.
He has a free pass for the pool.