Kacchera or Kachera (Punjabi: ਕਛਹਿਰਾ) or Kaccha (ਕਛਾ) are an undergarment for the lower body that is specially tailored for shalwar with a tie-knot naala or naada drawstring worn by fully initiated Sikhs.
This is one of five articles of faith—collectively called "Kakkars"—that form the external, visible symbols clearly and outwardly displaying one's commitment and dedication to the order (Hukam) of the tenth master.
The kachera is above-the-knee underwear meant to give a feeling of dignity, modesty, and honour to the person who wears it.
It serves to cover the genitalia, as well as to remind the Sikh of the Guru's commandment to think of members of the opposite sex as he or she would think of immediate family and not as objects of lust.
It serves its purpose efficiently and effectively and is easy to fabricate, maintain, wash, and carry compared to other conventional undergarments, such as the dhoti, etc.