Extra fine (19.5 micron) merino is used for these yarns. It feels soft and gentle against to the skin but is also strong and durable for good wearing properties. Its natural elasticity allows garments to stretch then return to their original shape. Merino is highly breathable, wicking away moisture from the body, helping you stay warm in cool weather and cool in warm weather. Naturally antimicrobial. These yarns are worsted spun from extra long staple fibres to produce a yarn that is fine and strong with a silky feel.