Woolmark describes Black Diamond's Rhythm tee using Nuyarn technology and a fabric weight of 95 grams per square metre. The product example combines Merino's fibre properties with an engineered yarn route intended to support stretch, drying and durability at a low weight.

A Lightweight Merino Tee Shows the Role of Yarn Engineering

The number describes fabric mass per area rather than the total weight of every garment size. It also should not become a claim about all Merino tees. The example illustrates how spinning and construction can alter performance within a fibre family, allowing lightweight designs that differ from conventional wool knitwear.