The fitting system inside your NEON helmet can be adjusted to three different positions to better match your head shape and size.
To adjust it:
Gently move the MIPS liner out of the way.
Pop out the fitting system leg from its current position.
Snap it back into position 1, 2, or 3 (with position 3 being the largest).
This allows the helmet to sit lower or higher on your head depending on your comfort.