Shoulder Support shooting practice

Buy for the shooting because using a Steadicam is often not practical view too heavy, shoulder support seems to work, it is small and not heavy with positibilité to "level up" to sail Photo.

However it does not come with instructions! and I highly doubt that is composed of fiberglass especially because it my seem to be of 98% plastic (1% for metal screws and 1% foam for shock).

Remains to be seen in the long term I would edit the com depending on how this goes usage.