Petticoat is the standard name in English for any underskirt worn as part of non-Western clothing such as the lehenga with the sari.It is the main undergarment worn with a sari. Sari petticoats usually match the color of the sari and are made of satin or cotton.A petticoat is an underskirt that is worn under a sari. A petticoat is an essential component of a sari. We carry saree petticoats in all colors. The petticoats have a drawstring waist and are one size fits all.