The Tau Circulum planter is made from fiberglass, a composite material composed of glass fibre and synthetic resin that is lightweight yet offers high strength. The planter has a smooth structure and is suitable for both outdoor and indoor use. Thanks to its frost resistant properties, the planter can remain outside during cold periods without any risk of damage. In addition, the planter is UV resistant, which keeps the material protected from discolouration and damage caused by sunlight.