Storm technology – Battle the elements with this lightweight jacket for boys. UA Storm technology repels water without sacrificing breathability. Wind-resistant – With its wind-resistant materials and tough construction, this sports jacket for boys stands up to the harshest elements. Lightweight sportswear – The windbreaker jacket is made from lightweight, ripstop woven fabric that is ultra-tough but designed for comfort. Superior breathability – This lightweight jacket has mesh lining for greater breathability and elastic cuffs to help keep the sleeves in place. Material and fit – Under Armour Boys' UA Sportstyle Windbreaker, durable sports jacket. Material: 100% Polyester. Fit: Loose.