First of all, wearing pantyhose can clearly show the strength and openness of the leg muscles. The white color is for the sake of aesthetics, and it gives people a pure feeling, which is in line with the noble and elegant feeling of ballet. Secondly, pantyhose are not necessarily white, but also black and flesh-colored.
And pantyhose are made to be tight to better emphasize the performer's movement, so that the teacher can better guide. And the tights can better help with soft movements such as the splits, and you won't catch a cold after a workout.