Men: Traditionally wear a white or off-white Dhoti. A simple Kurta or Angavastram (upper cloth/stole) is also appropriate. Avoid stitched lower garments like trousers during the core ritual if possible, as per tradition.
Women: Wear a simple Saree (preferably cotton or silk in subtle, light, or white/off-white colors) or a simple Salwar Kameez. Avoid black, very bright colors, or overly decorative clothing. Ensure the attire is modest and allows for comfortable sitting during the rituals.
Wearing new, unwashed clothes is sometimes preferred, especially for specific rites. The Pandit can advise on this.