Perfect for those hot summer days, this ultralight breathable shirt almost feels as if you are wearing nothing at all! The Run Ultralight Long Sleeve shirt offers you the most protection making it ideal for a day at the beach, a hike up the mountain, or a run around town on even the hottest of days. Flat, no-chafe seams for ultimate comfort SMART REFLECTIVE technology for increased visibility and safety in the dark Innovative dot design for better breathability Ultralight material Material: 90% Polyamide, 10% Spandex