It's lightweight enough to wear towards the beginning of summer and warm enough to wear during cooler days. If you live in San Francisco, nearly every day is a cooler day, so you might as well grab a few.
This sweater gets its soft superpowers from the fact that it's fleeced on the inside and then peached on both sides. Which basically means this is as soft as it gets. Until we figure out a way to make it softer.