Winter is a time of involuntary hibernation. For those who aren't willing to embrace this forced shut-in period (aka a whole lot of people), the promises of spring can often be a little overwhelming. And while the tendency to shoot straight to summer gear is almost irresistible, there are plenty of reasons to defer to the lightweight sweater. We know, wearing more sweaters once the weather warms can seem unbearable — but you'll be thankful for the added warmth (and style) that lighter-weight, cotton-comprised sweaters will bring on those chilled spring nights. Grab these now for layering, later for wearing alone with shorts and sandals.