Stylish beige half-zip fleece pullover sweater crop corset waist. The Oatmeal Marl Thrive Corset ¼ Zip Sweater. Running in a regular fit in our super soft fleece fabric you know and love, Thrive Corset is the perfect sweater to pull on for those days you need that extra bit of warmth. With a ribbed waist, creating a flattering fitted silhouette, and a ¼ zip funnel neck, Thrive is just as stylish as it is cosy. Minor spot on sleeve but in great condition