A great spring-summer piece of kit. When it's 30 plus degrees… take it off. It would be silly to wear a coat in 30 plus degrees. When it is chilly, or when the sun hasn't really warmed up the shadows yet, or when the weather doesn't quite want to admit it is summer... then the Boy's Vassbotnet Jacket Age 14+ is ideal. It crams up into a little ball for easy transport. It is warm but it breathes (thanks to the amazing PrimaLoft material). This really is a stonker of jacket.