Reversible Buff EcoStretch Reversible Cap * material: 95% recycled polyester and 5% elastane * recycled materials * UltraStretch technology: highly elastic product designed for maximum comfort and performance * seamless construction * UV protection * the cap is ideal as a base layer to protect against the cold when outdoor activities or high-intensity activities such as trail running, hiking, trekking, bouldering and climbing * helmet-friendly cap * designed in one piece and without any seams to achieve maximum comfort and prevent skin irritation * double-sided cap, functional cap