Dai clothing style is pretty similar with traditional Thai clothing, called chut thai. Chut thai for women usually consists of a pha nung and a cubic dress called sinh.
This is how phanung looks like.
Chut thai for men includes a pant, a Raj pattern shirt, with optional knee-length white socks and a sado (Thai name for fisherman pants). Men often would wear gaung baung, a traditional Burmese kerchief.