This is versatile layer for casual wear, and it is fairly warm (as warm as any second casual layer should be). The sleeves are nice and long. The fabric is soft and lighter weight than I expected. It's warmer than I expected given the fabric's light weight, but it seems a little too thin to be durable at the cuffs - I already have a little bit of pilling at the cuffs. As far as sizing, it's true to size. I usually wear between a S/M in tops (5'7", 135#, 34B up top and 28" waist), and the Medium is perfect. The elderberry color is a surprisingly neutral lavender and goes with most other colors.