NLS - New Level of Sustainability. The wool of the Ivanhoe SAP Full Zip sweater is undyed, showcasing the natural color of the sheep's wool. A proper wool sweater is a long-time favorite for cool weather wear and as part of layering. The wool in the NLS Sap Full Zip shirt is boiled. Boiled wool differs from felted wool: in the production of a boiled wool garment, a regular knit is made first, and then it undergoes heat treatment. The end result is denser than what can be achieved through knitting alone, but not stiff like felted material. - Regular fit - Rib knit cuffs, collar, and hem - High, protective collar - Full length zipper - Zippered hand pockets - 100% wool, material weight 450g/m² - Bluesign approved - Made in Europe In the production of clothing, dyeing materials accounts for a large share of the water and energy consumption and chemical load. When Ivanhoe uses undyed wool in its NLS garments, this load and consumption are completely eliminated!