Is the number of plies in a cashmere garment like a thread count -- the more the better?

The yarn in a two-ply shawl is two strands twisted together to compensate for uneven or weak spots in the individual strands, resulting in a stronger shawl. Additional plies add weight and warmth, but they aren't really a measure of quality. Generally, single-ply cashmere won't be as durable. But high-end makers, pull off lightweight, one-ply pieces with high-quality yarn and good construction.