Passion Three is a step up in insulation in the ultralight Passion range. This is achieved by using the H-Box construction that enhances insulation by giving the filling more room to gather heat. The filling is the finest European goose down on the market and the very soft and down proof fabric makes the Pasion Three extremely soft and comfortable. You choose Passion Three when you need to keep the weight down but also require more cold protection than the ultra lightweight little brother Passion One.