Yoga Block - Cork (1pc)Natural Cork Block! Get perfect support with these naturally grippy and durable cork yoga blocks! The best choice for yogis who prioritize sustainability and want a comfortable, and non slip surface for their practice. Cork is a renewable, biodegradable, and sustainable material that comes from the bark of cork oak trees. The bark regenerates every 910 years, so the trees aren't harmed during harvesting. Experience the support and peace of mind that