Lopi

Lopi is a distinctive Icelandic knitting material made from the fleece of Icelandic sheep. Unlike many conventional wool yarns, its raw material combines two naturally different fibre layers from the same sheep. The outer coat is composed of relatively long, coarse fibres that provide durability and resistance to moisture, while the undercoat contains shorter, softer fibres that contribute insulation and warmth. During processing, these layers are retained together, giving lopi its characteristic combination of lightness, warmth, weather resistance, and a somewhat airy structure. The term can refer both to unspun Icelandic wool roving and to lightly spun yarns produced in several thicknesses. Machine-carded unspun lopi is typically formed into flat, disc-shaped rolls. Historical use of the unspun material for knitting dates to approximately the 1920s. More recently, manufacturers have developed spun lopi yarns in multiple weights, making the material suitable for a broader range of garments and knitting techniques while preserving the properties associated with Icelandic wool. Lopi is closely associated with Icelandic textile culture and with the lopapeysa, the characteristic circular-yoke sweater traditionally knitted from Icelandic wool. The thicker forms of lopi are especially commonly used for these sweaters. The material’s structure supports garments that are warm without being excessively heavy, and its natural fibre shades provide a recognizable visual identity. Natural colours range across the shades present in Icelandic sheep fleece, while dyed versions expand the palette for contemporary knitwear. Most wool produced in Iceland is processed by Ístex, the Icelandic Textile Company, which manufactures seven types of spun lopi yarn as well as unspun lopi. Its products are offered in natural fleece shades and dyed colours and are sold through yarn retailers in Iceland and internationally. Þingborg is also identified as a producer of lopi. Because the name describes a material and knitting tradition as well as commercially packaged yarn, production is not limited to a single corporate owner or brand house. Lopi’s market position rests on provenance, local sheep breed characteristics, traditional Icelandic craftsmanship, and functional performance rather than on mass-market fashion branding. It is used by hand knitters, textile makers, and visitors seeking materials connected with Icelandic culture. The product remains active in the international specialty-yarn market, particularly through the continuing popularity of Icelandic lopapeysa sweaters and related knitwear.

Lopi originates in Icelandic sheep fleece and reflects the unusual biological structure of the Icelandic sheep’s wool. The fleece has an outer layer of long, coarse fibres known for resilience and resistance to wet conditions, together with a shorter, softer inner layer that provides insulation. Icelandic wool processing keeps these layers together rather than separating them into entirely different commercial fibre streams. The resulting material has become recognized for being warm, relatively light, and suitable for garments exposed to cool and damp weather. The earliest documented knitting use described for lopi dates to around the 1920s. At that stage, the material was used in an unspun form. Machine-carded lopi roving was produced in flat, disc-like rolls, allowing knitters to draw out the fibre as they worked. This unspun format became part of Icelandic knitting practice and helped establish the material’s association with locally made wool garments. Subsequent production introduced lightly spun forms in a range of thicknesses. Spinning made lopi easier to package, distribute, and use in standardized knitting patterns while retaining much of the material’s characteristic structure. Producers developed multiple weights for different garment constructions, from the heavier yarns conventionally used for Icelandic sweaters to lighter options for other knitted articles. The development and continued popularity of the lopapeysa gave lopi a particularly strong cultural and commercial identity. The lopapeysa is an Icelandic sweater generally recognized by its circular yoke and patterned bands. Its thicker yarns provide the volume and insulation needed for this style, while the natural and dyed colour options support the distinctive geometric designs associated with Icelandic knitwear. As Icelandic sweaters became popular outside Iceland, demand for the yarn and for patterns using it also reached international knitting communities. Ístex, the Icelandic Textile Company, processes most of the wool produced in Iceland and is the principal manufacturer identified with commercial lopi production. It produces seven types of spun lopi along with unspun lopi, offering both the natural shades of Icelandic fleece and dyed colours. Retail availability extends beyond Iceland through yarn shops and international distribution. Þingborg is also identified as a lopi producer, indicating that the material’s production ecosystem includes more than one Icelandic maker. Today, lopi remains an active textile material and specialty-yarn category rather than merely a historical craft product. Its uses continue to centre on hand knitting and warm wool garments, with the lopapeysa remaining its best-known application. Its distinctiveness comes from the relationship between Icelandic sheep, local processing, traditional knitting, and global interest in Icelandic design. The name therefore encompasses a fibre preparation, yarn formats, and a broader cultural product associated with Icelandic wool craftsmanship.

1. 1920Early use of unspun lopi

   Unspun lopi began to be used for knitting around the 1920s, establishing the material’s place in Icelandic textile practice.

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2. Development of spun lopi yarns

   Producers later introduced lightly spun lopi in several thicknesses, expanding the material beyond its original unspun roving format.

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3. International retail availability

   Commercial lopi yarn became available through retailers in Iceland and in markets around the world.

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Traditional Icelandic wool distinguished by the combined weather-resistant outer fibres and insulating soft undercoat of Icelandic sheep fleece. Lopi is positioned as a functional, culturally specific specialty yarn for warm knitwear, especially Icelandic lopapeysa sweaters.

• Unspun lopiUnspun wool roving

  Unspun lopi is machine-carded Icelandic sheep wool formed into disc-shaped rolls. It preserves the fleece’s long, coarse outer fibres together with its shorter, softer insulating fibres. Knitters can draw the roving into a working strand while knitting, creating a light and warm fabric. This format represents the older form of lopi use associated with Icelandic knitting and remains available alongside spun products.

• Spun lopi yarnWool yarn

  Spun lopi is lightly twisted Icelandic wool yarn made in several thicknesses. Spinning provides a more conventional yarn format for knitting while retaining the mixed-fibre characteristics of Icelandic fleece. Commercial producers offer the yarn in natural fleece shades as well as dyed colours, allowing it to be used for traditional sweaters and a wider range of contemporary knitwear.

• Thick lopi yarnHeavyweight sweater yarn

  Thicker lopi yarns are the forms most closely associated with Icelandic lopapeysa sweaters. Their loft and insulation support warm, substantial garments, while the mixed structure of the wool contributes weather resistance and a characteristic textured appearance. These yarns are commonly used with traditional Icelandic sweater patterns and circular-yoke designs.

1. Lopi (knitting)