Cardigans can be worn over a shirt, polo or T-shirt and adjusted easily through the day. Button-front V-necks work well for business-casual clothing, while zip and mock-neck styles feel more relaxed and give more coverage around the neck.
Shawl-collar and cable-knit cardigans are heavier and work best with jeans, corduroy and casual trousers. Fine merino and cashmere styles are easier to wear beneath a coat. Compare the fastening, neckline and fabric weight according to how warm and formal you want the cardigan to be.