Dukula
Dukula was an ancient Indian cloth made from the bark of trees. Some contemporary varieties kshauma, netra, and tiritpatta including Dukul were among the fabrics that were comparable to silk. Some sources suggest that Dukula was silk, but actually it was made of bark fiber As a result, it was a fine linen. According to Amarasimha, the word "dukula" was a synonym for "ksauma" (linen)

Mentions 
Dukula (especially with the swan pattern) is recognized as arguably the finest cloth in the Gupta period literature.Bāṇabhaṭṭa, a seventh-century scholar (who was the Asthana Kavi in the court of King Harsha Vardhana), also makes reference to "hansa dukula", a material patterned with hansa (swan or goose). The gods and kings wore it. The Harshacharita (King Harsha Vardhana of Kanauj's biography) lists a variety of textiles, Banabhatta describes a range of textiles displayed during an exhibition at Harsha's sister's (Rajyashri's) wedding. "Dukula," "amshuka," "kshauma," "badara," and "netra" are among the names he mentions. Kumārasambhava poem of Kalidasa also refers to "dukula" while comparing the attire of Lord Shiva and the Hindu goddess Parvati. Kalidasa also mentioned Dukula in Vikramōrvaśīyam and Ṛtusaṃhāra. He referred to Dukula as silk. Production 
Bengal was a well-known production centre for these types of cloths. Kautilya in Arthashastra acknowledges Bengal as a producer of Dukula. See also 
 Kausheya (silk)
 Hamsa (bird)

References 

Textiles
Hindu religious clothing
Indian clothing