A lungi is a cotton sarong worn in South Asian and African countries, namely Pakistan, India, Bangladesh, and Sri Lanka. It is a rectangular piece of cotton stitched into a tube. It is particularly worn in hot and humid countries, where the climate is unfavorable for pants.
Step into the tubular cloth. It should be a little higher than your navel.
Grab the top right corner and pull it just past your navel. Repeat with the top left corner. Make sure it's tight.
Fold down the two flaps under the navel. Continue folding in the back and repeat, until a tight belt is made.
Pull up on the bottom hem, so it is aligned with the belt. Put your hands on both ends of the hem and push out horizontally.
Grab both ends in your hands. Bring them to the front and tie the two corners.
Flatten any wrinkles or ruffles formed.