The Yoga block is available in non-toxic, scratch-resistant first grade EVA foam with 3mm chamfered edges or in recycled chip foam. It is essential for support to the head in forward bends and for lifts in seated twists and for use as cushioning in inversions such as the shoulder stand (4 required). 305mm x 205mm x 50mm 42kg/cbm density Size: 305mm x 205mm x 50mm Colour: Blue