Sprung saddles or suspension seatposts in combination with the BERNDS suspension / shock-absorber unit are, from a mechanical point of view, two separately oscillating systems, each with its own independent behaviour. This includes characteristic data such as the current frequency of oscillation, the resonant frequency and damping. We only know how our BERNDS suspension / shock-absorber block behaves, but not the behaviour of the different models of sprung saddles. As a result, we cannot exclude that the two together will lead to a build-up of oscillations and thus increased, unpredictable load peaks on the materials.
What's more, we are convinced that suspension seatposts are superfluous on a BERNDS. Let yourself be convinced on a test ride!