The distinction between merino and standard wool lies primarily in fiber diameter, crimp, and subsequent feel. Merino possesses a finer fiber, resulting in a softer, less itchy texture compared to typical wool. This fineness is measured in microns; merino generally falls below 24 microns, while regular wool can be coarser. Furthermore, merino exhibits a higher crimp, which refers to the waviness of the fiber. This increased crimp contributes to its elasticity and ability to trap air, enhancing insulation and breathability.
The preference for merino stems from its superior comfort and performance characteristics. Its softness makes it suitable for next-to-skin wear, eliminating the scratchiness often associated with traditional wool. The enhanced insulation and moisture-wicking properties of merino contribute to temperature regulation, making it versatile for a range of climates and activities. Historically, merino sheep were prized for their wool quality, contributing to their widespread breeding and the development of the modern merino fiber industry.