Technical - Moisture-resistant outer face fabric, Breathable, Lightweight, Compressible and packable, Insulated, Wind resistant Construction - Performance stretch fleece side panels give ventilation, Resilient Coreloft™ Compact 60 insulation is breathable, warm, and light, performs if wet, and delivers loft retention that resists packing out, Light, soft Tyono™ 20 is air permeable Design & Fit - Trim fit for base layer or light mid-layer use Fabric Treatment - DWR (Durable Water Repellent) finish repels moisture EUC! Too small for me