Bamboo Viscose is an excellent material for a rug. It feels wonderful on bare feet. It is durable. It looks amazing. I strongly recommend ordering the sample to have a look at. It is hard to tell the difference between this material and silk. Of course the silk is a bit better, but you pay a lot more for it.
It is equivalent to 80 knots per square inch – hand-tufted on a cotton base – with a pile depth of 8-10mm.