The Lowline II Lightweight Core Stretch Sweater is an overhead midlayer made from recycled polyester/elastane midweight fabric. It is warm, light, stretchy, and quick-drying. It features a half-zip fastening to allow for ventilation when needed. This is an everyday essential, made with warm-backed stretch fabric, featuring a full Ilus Core construction and a 1/4 length zip, high neck for close fit comfort, and an overhead design.