The Dainese No Wind Layer D1 adds an extra layer of insulation to keep you warm. It’s elasticated fabric is windproof and waterrepellent and yet very thin. This gives you the option to not only wear it underneath a textile jacket, but if your leather jacket is not skin tight you could wear it underneath that as well! From now on you won’t freeze to death anymore in the winter, or you can still look cool with your perforated leather jacket during chilly rides!