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. Chemical free anti-bacterial odour control treatment. The Lowline II Lightweight Core Stretch Sweater is made from recycled polyester/elastane midweight fabric. It is warm, light, stretchy, and quick-drying with a half-zip fastening for ventilation.