The OGIO Endurance Pulse Crew is designed with comfort and breathability in mind. Made from 4-ounce, 100% poly jersey with stay-cool wicking technology, this crew is perfect for any activity. It also features a self-fabric collar, reflective O heat transfer at the back neck, reflective stacked O heat transfers at the back, OGIO Endurance heat transfer label for tag-free comfort, modified, set-in sleeves, and reflective O Endurance heat transfer at the right hem. White and Pace Yellow are 4.6-ounce. Get the perfect combination of comfort and breathability with the OGIO Endurance Pulse Crew.