What did the Indians use as underwear?

Answer 1

Native Americans did not use underwear and said that white people wear "too many clothes".

For most males, wearing only a breechclout was considered to be fully dressed and they would wear this when sleeping, swimming, riding a horse or doing anything else; other items such as leggings and shirts were simply extras in case of cold weather or for protection against wind and sun. The breeclout (originally of soft-tanned hide, later of trade-cloth) was generally a very long, narrow rectangle with the centre placed between the legs - both ends were then drawn up and over a thin belt and allowed to fall front and back.

Women generally wore nothing at all beneath the dress or skirt, unless they chose to wear short leggings tied below the knee.