Kavach is a Sanskrit word which means Armour.
Durga Kavach is a collection of special 61 shlokas from the Markandey Purana and is part of the Durga Saptashti. This Kavacham (armour) protects the reader in all parts of his body, in all places and in all difficulties. Every part of the body is mentioned and Devi, in all different forms, is being worshipped. Further, Devi, in different names, is prayed to for happiness, wealth, health, power and prosperity.