Made of high density durable foam and provide firm support. Heathyoga blocks offer exceptional strength, holding their position even under considerable weight. A useful basic tool for any yoga practice, this set of two yoga blocks from Heathyoga provides the stability needed to achieve better balance, proper alignment, and deeper poses. Seasoned yogis will appreciate the support in more advanced poses, while beginners can benefit from the extended height when focusing on flexibility. No need to over-stretch tight muscles and risk injury.