These Yoga-Mad OM yoga 'sandbags' can be used to deepen yoga postures and to enhance stretches. Filled with a pea shingle instead of sand for even weight distribution; the shingle conforms better to your body shape with the additional benefit of not feeling as cold to the skin, or damp during winter. The outer cotton cover is soft, offering good grip on the skin and the inner nylon cover is durable and leak free. Complete with embroidered OM and a sturdy carry handle. Features: Material - Outer cotton cover. Inner lining nylon. Shingle filling. These Yoga-Mad OM yoga 'sandbags' can be used to deepen yoga postures and to enhance stretches. SPECIFICATION: Brand Yoga Mad Usage Home Use, Commercial Use Condition Brand New Warranty 12 Months Warranty