A Berhampuri silk saree originates from Berhampur, Odisha, known as the "Silk City of Odisha." These sarees are celebrated for their exquisite craftsmanship, luxurious silk texture, and distinctive double pallu design, which features two contrasting or complementary ends (pallus) that add elegance and versatility to the drape. The "rust color" likely refers to a rich, earthy reddish-brown shade, a popular choice for its warm and sophisticated appeal. The "heavy thread work pallu" suggests intricate embroidery or weaving, possibly with zari (gold or silver threads) or silk threads, creating elaborate traditional motifs like temple designs, floral patterns, or geometric shapes. This kind of detailing is typical in Berhampuri sarees, especially for special occasions like weddings or festivals. 
These sarees are handwoven by skilled artisans, reflecting Odisha’s rich cultural heritage, and are often GI-tagged (Geographical Indication) for their unique weave and quality. The heavy thread work on the pallu would make it a standout feature, perfect for formal events where the pallu is prominently displayed.