A blazer and a turtleneck are a wonderful look to add to your current casual rotation. You could perhaps get a bit experimental on the shoe front and tone down this look with a pair of white athletic shoes. A great illustration of transitional style, this outfit is perfect when warmer days are here.
For a look that's pared-down but can be dressed up or down in a myriad of different ways, opt for a blazer and a turtleneck. For something more on the casually cool end to round off your ensemble, complement your ensemble with white leather high top sneakers. So if you're looking for an ensemble that's stylish but also totally spring-appropriate, this one fits the task well.