MANDUKA CORK BLOCK: Made of sustainable cork, this high-quality cork yoga block has a firmness not found in foam blocks and allows you to feel secure in the support it provides. Easy to grip textured surface-- Great for beginner to advanced yogis SAFE AND EFFECTIVE: Improve your practice by using blocks to maintain proper alignment, deepen your stretches, and to help stay safe by reducing injury and muscle strain. Perfect for restorative yoga classes, Pilates, meditation, fitness and exercise LIGHTWEIGHT AND STURDY: Cork blocks have a firmness and support not found in foam blocks. Featuring a rounded edge for maximum comfort, support, and grip. Manduka’s Cork Yoga Block weighs less than coarse-grain cork commonly used for blocks SUSTAINABLE CORK: Cork is a renewable, sustainable material. Responsibly made with no toxic chemicals produced during harvesting or manufacturing. Manduka is committed to creating responsibly sourced products while minimizing environmental waste PRODUCT DETAILS: Lean size, easy to transport. 8.5" x 4" x 2.75"; Keep your blocks looking great by wiping down after each use with Manduka's Botanical Cleaner