With the Ansur Windproof series, Klättermusen, the Swedish outdoor brand well known for its sustainable products, is introducing a new windproof alpine and trekking outerwear line made of Katla Cotton, a new variety of organic cotton certified by the Global Organic Textile Standard. Klättermusen describes the material as an organic alternative to synthetic outerwear. The cotton is woven under pressure and heat, making it windproof, water-repellent and breathable. It is also biodegradable. Combined with rip-stop threads made of cotton with a higher denier count, Katla becomes extremely robust and hard-wearing. Since Katla is 100 percent downproof, it is also ideal for winter clothing. Inspired by the manufacturing process, which requires heat, the new organic cotton is named after one of the most active volcanoes in Iceland.