Bamboo is the fastest growing, most sustainable wood—period. Our Bamboo Yoga Blocks feature hollow construction to reduce the weight, rounded edges for comfort and a satiny finish. • Natural bamboo is sturdy and stable • Rounded edges are comfortable for supported and Restorative poses • Hollow construction reduces weight, making these blocks easy to transport Eco Properties: Made from sustainable bamboo http://www.fitdango.com/hugger-mugger-bamboo-block.html