Columbia Women's PFG Zero Comfort Short Sleeve T-Shirt Polyester / Elastane A technical tee shirt with feminine, street-friendly style, this cooling short-sleeve shirt features an active fit in a soft stretch fabric thats built for movement, with UPF 50 sun protection, pretty shirring detail at each shoulder, and our industry-leading cooling technology that reacts with your sweat to provide instant and prolonged cooling 92% polyester/8% elastane ZERO jersey