When you're training outdoors, don't forget to apply some sunblock?. the women's Under Armour Sunblock SS Tee. This Skin Cancer Foundation-approved top is UPF 50+ and lightweight, breathable and wicks sweat away quickly with the signature Moisture Transport System. Tech Specs & Features: UPF 50+ protection HeatGear® technology, keeps you cool when the weather heats up. Signature Moisture Transport System wicks sweat away to keep you dry and light. Breathable mesh paneling Drop-tail hem offers superior back coverage. 88% polyester, 12% elastane