Kaldi cap is made of Icelandic wool. The Icelandic sheep has two coats of wool, a fine warm inner coat (Þel) and a coarse long haired outer coat (Tog), providing shelter for cold, rainy and windy days. The natural colors of the Icelandic wool are mostly used for the traditional sweater. These are black and grey tones as well as brown hues. The inner layer of Kaldi cap is made of Gore® Windstopper® fabric. Thus making the fabric absolutely windproof and delivering maximum breathability for comfort in cool and windy weather conditions. Fabric: 100% Icelandic Wool. Lining: GORE Windstopper, 55% PES/45% PA. Care: hand wash. Do not bleach. Do not tumble dry or iron.