The Yoga Mad chip foam half block is used to lessen the height of one's lift by less than 2'' (5cm) in one go i.e. in Virasana. It is designed to be used as cushioning in inversions, such as the shoulder stand (four blocks required), to support the head in forward bends & for lift in seated twists. The block is made from recycled chip foam, which means that the actual colours may vary.