It began with raincoats and waterproof outerwear suited to the local climate, early pieces made from cotton treated with castor oil sourced from abandoned post-war military aircraft materials. Through the 1950s Herno diversified into handwoven cashmere coats and womenswear, opened in Osaka and Tokyo in 1968, and for years produced outerwear for houses including Gucci, Prada, Louis Vuitton and Burberry.
From the 1980s the brand made its name with parkas and down jackets in lightweight nylon, ultrasonic stitching and natural down drawn exclusively from Siberia and Italy's Lomellina region. In 2007 leadership passed to Claudio Marenzi, son of the founders, who introduced sustainability initiatives including an energy self-sufficient, solar-powered Lesa headquarters; recent years have added knitwear, accessories and, in 2025, the Habita home line.