The merino breed of sheep originated in Spain and the wool is noted for its fineness and whiteness. It was confined to Spain until the late 1700s when merino sheep were exported to, and bred in, many other countries. Well known types of merino are: Australian, Rambouillet, Vermount, South African, Saxony. The word merino is now almost synonymous with fine wool, the wool being finer 25 microns."
From Textile Terms and Definitions, Tenth Edition, Manchester 1995, p. 208
The merino fibre is the finest fibre in the world. It is renowned for its natural elasticity, lustre, resilience, density, strength, warmth and softness. Because of those features it is the perfect fibre for our ultrasoft merino products.
Independent research undertaken by the Hohenstein Institute to assess thermophysiological comfort properties found that people using synthetic fibre blankets experienced undesirably higher body temperatures and irregular heartbeats, resulting in less comfortable and restful sleep compared to woollen blankets.