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 to allow for adjustable ventilation. The sweater is crafted from lightweight Ilus Core warm-backed knitted stretch fabric, ensuring it's quick-drying. It has a half-length zip with an inner zip and chin guard for comfort.