Mandukas Recycled Foam unBLOK is here to take yoga poses a step further. With its functional, sleek design, and high-quality eco-friendly materials, this revolutionary block will help you unBLOK your practice this year. Designed by Manduka's founder Peter Sterios. The rounded side of the block is perfect for chest openings and more comfy support under your palms and knees. The straight side keeps firmly on the ground.