Thirubhuvanam Sari

Thirubhuvanam silk saris are woven by the Pattunool community of Saurashtra, whose ancestors migrated to Tamil Nadu from South Gujarat.
Thirubhuvanam saris mostly had a single side border and double side borders were made on custom orders. It was also a way to keep the cost in check as most saris are woven using only pure zari as the community historically traded in silk, silver and gold ornaments. No thread work is ever seen on Thirubhuvanam saris.
The saris are lighter in weight than Kanchis ...use filated two-ply yarn for the warp, and three or four-ply for the weft, to ensure a  light and easy drapes with a great fall and feel.
Thirubhuvanam saris are woven continuously on the loom and the pallu is simply made to run on from the body of the saree. This technique is called the ‘poraiilapu’ and it ensures that there is no unevenness or splitting of the yarns. So the Korvai technique is not used traditionally.
The designs are a mix of the traditional and contemporary but the saris usually came without blouse yardage.So all pointers to keep it a pure silk pocket friendly sari than a Kanchi.
Speciality of Thirubhuvanam saris is the way they are folded. They are pleated, and folded so that when unfolded, the pleats fan out, giving it the name Visiri Madippu. This would make it easier to drape the sari, because the fold is such that the lines of the pleats are clear. All one needs to do is to pleat it along the lines of the fold. The other fabled hearsay is that they were folded as such for the royalty to keep the design elements a secret till they were adorned by royalty and that tradition continued. 
Kanchipuram's proximity to Chennai has made it more popular but people in and around Thanjavur and Kumbakonam still prefer the Thirubhuvanam saris, even for weddings.
However recently there is unexpected sprout in the power looms in this cluster with a lack of skilled workers and decreasing interest of the new generation in silk saree weaving... so chances of finding a power assisted or a powerloom Thirubhuvanam sari is a higher probability these days.