A midway wristband is a pass, bought separately from gate admission, that lets the wearer ride every midway attraction during a set block of time. It applies only at fairs that run a ride midway. Fairs without rides have no wristband to sell, and their gate admission covers the whole visit.
Midway wristband
A separately priced pass for unlimited midway rides during a set time block.
See it at these Massachusetts fairs

Shown first
AgriculturalFamilySeasonal
Topsfield Fair
Eleven days of livestock, rides, and giant pumpkins.
Oct 2–12Topsfield
EndedAgriculturalFamilySeasonal
Marshfield Fair
A South Shore tradition since 1867. Midway, demo derby, and agricultural exhibits.
Aug 21–30Marshfield
EndedAgriculturalSeasonalFamily
Three County Fair
A Northampton fair dating to 1818, with rodeo and livestock shows.
Date not confirmedNorthampton
EndedAgriculturalFamilyFood Festival
The Big E (Eastern States Exposition)
New England’s great state fair, 17 days, six state buildings, and cream puffs.
Sep 18 – Oct 4West Springfield