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. Featuring a half-zip fastening for adjustable ventilation, this everyday essential is crafted from warm backed stretch fabric with a high neck for close-fit comfort. Everyday essential Recycled warm backed stretch fabric - Ilus Core 1/4 length zip High neck for close fit comfort Overhead design