Lopi

Lopi is a traditional Icelandic wool yarn used for knitting, most famously in the lopapeysa, the circular-yoke Icelandic sweater. The term refers to the fiber produced by Icelandic sheep and the yarn that results from processing it. Lopi is valued for its warmth, light weight, and elasticity, which make garments comfortable and capable of withstanding shifting colorwork and textured patterns.

Historically, lopi has been produced from Icelandic sheep, a breed known for its dual coat that yields a resilient, airy fiber. In the 20th century Icelandic mills and brands helped standardize and distribute lopi yarn internationally, with Istex among the best known producers. The yarn is typically offered in bulky to worsted weights and in a range of natural colors—white, gray, and brown—as well as many dyed shades.

In use, lopi is favored for colorwork projects such as the iconic lopapeysa, where the fiber’s elasticity and breathability aid stitch definition and wearability. The yarn’s air-rich structure provides warmth without excessive bulk, and it tends to hold its shape well over time. Lopi can be knitted on relatively large needles, depending on the desired gauge and pattern.

Care for lopi yarn varies by product. Most lopi fibers are best cared for with gentle washing in cold water and laid flat to dry, though some modern blends may have different care requirements. Availability extends worldwide, reflecting the global appeal of Icelandic knitting traditions.