Cork Yoga Block Yoga Blocks are a useful tool for both beginner and seasoned yoga practitioners, for beginners they can be used when the flexibility isn’t quite there yet, for more advanced practitioner’s yoga blocks can be utilised to achieve the most difficult of yoga poses. The Cork Yoga Block sets the standard for high performance yoga props. Cork is a renewable, sustainable material which has a firmness not found in foam blocks, allowing you to feel secure in the support it provides.