Manduka's Recycled Foam Yoga Block is the first among equals - consisting of over 50% recycled EVA foam, this lightweight yoga block provides unbeatable comfort, style and support. Manduka's Recycled Foam Yoga Block is first among equals, it redefines the quality and recycled content standards for all foam blocks. Between 50% to 75% of each block is guaranteed to contain a mixture of post-industrial and post-consumer recycled EVA foam without compromising durability or performance.