How do flying squirrels achieve their movement, as noted in the Pteromyinae subfamily?

Answer

They glide using a furry membrane of skin called a patagium

Flying squirrels are specialized for gliding, achieving this motion via a patagium, a stretch of skin between their legs, rather than actual flight.

How do flying squirrels achieve their movement, as noted in the Pteromyinae subfamily?
taxonomyanimalmammalclassificationsquirrel