You can't miss the very typical look of this green incense. Sturdy, branched plants standing upright. The branches are tubular, spongy and up to approx. 5 mm thick. They become 25 to 40 cm high. The name felt weed is clear: The whole plant is occupied with a dons of small hairs (actually they are blisters called utriculi, but you don't see that with the naked eye). Codium is often growing together with other types of incense, such as the redfish. In some places he can form whole fields. in winter, a form is also found with much thinner branches, almost wired.