NIKE Pro Hypercool Allover Print Shirt Boy's Pro Hypercool T-Shirt. Fitted Design Makes It Ideal For Layering Under Uniforms. Nike Pro Hypercool Technology Ventilates And Wicks Sweat. Stretch-Mesh Back Panel And Underarm Gussets Enhance Comfort. Fabric: 92% Polyester / 8% Spandex. Machine Wash.