Hypercool Design Developed to Be Worn 365 - All Year Round Hot to Colder Weather Conditions. Style Has a V-neck. Seamless Constructed Dri-fit Fabric Made From Nylon and Spandex for Lightweight Comfort, Stretch, and Reduced Irritation From Chaffing. You Can Show Compression Fit Keeps You Locked in and Ready for Battle While Keeping You Comfortable. Style Has An Engineered Knit Back Panel for Maximum Breathability and Ventilation Where Needed Most.