The 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.It is designed with contours and ergonomic support to be gentler on the body. The curved side can also offer an optional balance challenged when used with curved side down.