WoolPRO by Merrow 100% Merino Sport Hoodie - The Helios Merino wool The Helios hoodie is made of 100% Merino Wool. We don't like to brag, but the 250gram wool is possibly the most luxurious material that has ever been used to craft a hoodie. WOOLPRO is Designed by Merrow in Fall River, Massachusetts. The Merrow Sewing Machine company has designed sewing machines since 1838. They invented the industrial overlock stitch! Merrow knows textiles, and they have used their industry knowledge to create a great wool brand. MERINO WOOL IS AMAZING; it is durable, odor resistant (does not smell, EVER), and is a wonderful insulator. And, it does NOT itch. ATHLETIC FIT! The WoolPRO Helios is designed with an Athletic Performance Fit. No extra bulk, No extra weight, and super comfortable. EASY TO WASH. It is simple, Machine Wash Warm, Tumble Dry.