All Winona Irene hair accessories are made from cellulose acetate, a fully biodegradable material made from wood pulp. It has been shown in studies to degrade within several months in many natural environments, even in seawater.
Lucky for you, it is very resilient and durable compared to plastic, and can last for decades when cared for and kept in a normal household environment. Keep these whimsical hair accessories for years to come.