Not as big and heavy as the Back, more flexible than the sliding pillow.This pillow can also be made even more flexible with further inserts.All felt inserts for the sliding pillows can be inserted into the Midi-Back.You can see a selection in the accessories.Also think of a height-adjustable floor stand.
Smaller than the Back, less heavy, more flexible than the sliding pillow. All F-inserts fit to this pillow.