A denser, more supportive block, the Gaiam Athletic Yoga duraBlock provides the stability needed for optimal alignment, deeper poses, and increased strength. The blockDD (Dura-Dense) Technology is firmer than standard clocks – ideal for larger athletic bodies and repeated use. The duraBlock provides a secure grip and long-lasting performance. Spot clean with mild detergent. Towel or air dy. 9″W x 6″H x 4″D.