flexible fit, enhanced ventilation. the nike flex-fit tour golf hat features a stretch-to-fit design and eyelets at the front panels for a secure, flexible fit and excellent breathability.. benefits. dri-fit fabric to wick away sweat and help keep you dry and comfortable. six-panel design for structure. structured silhouette for durability. eyelets at front panels for enhanced ventilation. product details. fabric: dri-fit 83% nylon/14% cotton/3% elastane. hand wash.