The Lowline II Lightweight Core Stretch Sweater. An overhead midlayer in recycled midweight fabric. Warm and light, stretchy and quick-drying. Featuring half-zip fastening to get air when you need it. This product recycled 15 plastic bottles. Crafted from lightweight Ilus Core warm-backed knitted stretch fabric, this midlayer is quick-drying and features a half-length zip with an inner zip and chin guard for comfort and adjustability.