outer robe, or saṃghāti.
The saṃghāti is an outer robe used for various occasions.
It comes over the upper robe (uttarāsaṅga), and the undergarment (antarvāsa).
In representations of the Buddha, the saṃghāti is usually the most visible garment, with the undergarment or uttarāsaṅga protruding at the bottom.
It is quite similar in shape to the Greek himation, and its shape and folds have been treated in Greek style in the Greco-Buddhist art of Gandhāra.