Nike Pro HBR Compression Boys' Shorts COMFORT. Lightweight and breathable, the Nike Pro HBR Compression Boys' Shorts bring the power of Dri-FIT jersey and mesh fabrics in a durable design that's as tough as you. Dri-FIT fabric helps keep you dry and comfortable. Stretch mesh enhances ventilation and enables mobility. Flat seams feel smooth against your skin. 90% POLYESTER 10% SPANDEX