A stylish but simple cardigan should be a staple in everyone's spring wardrobe. You can pair it with jeans or a sundress and wear it buttoned up for more coverage or leave it open as a layer - the options are endless. Jennifer Garner shows how a cardigan can even be the statement piece of your whole look, leaving us determined to copy her effortlessly chic style. The actress was recently spotted on the streets of Santa Monica wearing a simple but luxe outfit: a white cashmere cardigan with brown striped trim, straight leg jeans and sporty sneakers.