Posidonia rings are made of hypoallergenic stainless steel 2cm in diameter and methacrylate in two shades of metallic green.
They are inspired by the underwater Posidonia meadows, so important ecologically as it protects the coastline from erosion. Within them live many animal and plant organisms that find food and protection in the meadows. It is a great bioindicator of the quality of coastal marine waters.
