Marmot Women's Cabrillo Flannel Long Sleeve Tee, Dark Khaki, Small 52% Hollow Core Polyester, 48% T400 Polyester Flannel Stretch 5.0 oz/ yd Soft, Comfortable, Mid-Weight Performance Woven Fabric with Twill Texture Technical Hollowcore Flannel for Durability and Thermal Properties Without the Weight Ultraviolet Protection Factor (UPF) 30 T400 Durable Stretch for Increased Moblity Quick-Drying and Wicking