Boston Proper Navy Blue Single Button Knit Blazer Jacket Womens Size 6 Boston Proper navy blue knit blazer offers a polished yet comfortable layer for professional or casual wear. Crafted from a stretchy, textured knit fabric, this single-button jacket features a classic notched lapel and darting for a tailored, feminine silhouette. The long sleeves are finished with decorative three-button cuffs, and the back is designed with a clean center seam and a subtle vent for ease of movement. Perfect for the office or pairing with jeans for a sophisticated weekend look.