Sweater weather may be in the distant future, but the September weather calls for something a little lighter . . . and that's where these sweater vest comes in. Chic, versatile and just the right amount of cozy, these layering heroes from Amazon, Nordstrom and Walmart bridge the gap between summer tanks and chunky fall knits - all under $50. Whether you're pairing the sweater vests with crisp trousers for the office, styling them over a button-down or throwing them on with jeans, you'll reach for these 17 transitional pieces again and again.