The term flex refers to the stiffness and rigidity of a floorball stick's shaft, and it affects how much the stick bends during actions like a slap shot. Flex is measured in millimeters using a test machine that applies a specific pressure to the stick. If the stick bends 26 mm, it is given a flex rating of 26. The scale ranges from the hardest flex at 23 to the softest at 36.
Men typically choose a flex between 23-31, while women tend to use a flex between 27-31. For juniors, a flex between 26-31 is suitable, and for younger children, a flex between 31-36 is recommended.