Product Details Overview Stay cool and dry on your next run in the rnnr Pacer Hat. Constructed with an ultra-lightweight 2.1-ounce design, the lightweight Pacer Hat utilizes a laser-cut mesh fabrication for elite-level ventilation that will prevent overheating in even the gnarliest warm-weather conditions. Runners can also customize their style thanks to a flexible brim which can be curved, flipped, or fashioned in any way your heart may desire.