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. Design & Features: Contains between 50%-75% recycled post-industrial & post-consumer EVA foam Radius edges for comfort and beauty High density, extreme durability, firm support Soft, comfortable grip that is also slip-resistant Additional Details: For additional information relating to the Manufacturer's Warranty, please contact 1-877-626-3857