4 ply Organic Austrian Wool: 3 Strands of 4.4 wt Wool and 1 Strand of 7.0 Weight Wool Color Black OR Two Tone Mele Grey Weave of 100% Austrian Boiled Organic Wool. Made in Austria. Heavier and Thicker than our Regular Alpine Cap with Head Seam for Added Warmth and Reduced Heat Loss Exclusively Ours--No Other 4-ply Wool Cap Like This in the World by Dachstein Woolwear. Measures 11in lying flat and a full half inch thick, 50% More Final Weight. Water Repellent; Hand Wash We've added an extra 2 plys to our favorite Alpine Cap to create the 4 Ply Extreme Warm Cap! The Dachstein Woolwear 100% Wool Extreme Warm Alpine Cap is hand knit in Austria. You will find that an amazing thick boiled wool hat is just what you need to keep body heat from escaping in the coldest of climbs! Perfect for skiing, hunting, snowboarding, climbing, ice fishing, polar expeditions and any other outdoor winter sport you can think of.