Sadhus will often smear ashes on their bodies, as seen here. The ashes are from the fires of the "dhuni", a ceremonial fire that is kept burning in recognition of the transitive nature of the universe.

This man is smoking a 'chillum', a clay pipe in which they are known to put 'charas' and other derivatives of the hemp plant. Consumption of charas is considered a devotional aspect of the life of a sadhu, particularly those who adhere to Shiviite practice.