Streamline your sun protection with the Ciele FSTCap Elite Ethereal Cap. This ultra-lightweight running hat barely feels there, weighing only 37 grams. Run with confidence knowing that the lightweight fabric is crafted with TERRAstop ripstop fabric, and the outside features a DWR (durable weather-resistant) coating that protects against light rain. COOLmatic | EXP HOLLOWmesh™ knit with embedded carbon yarn helps ventilate hot air, keeping your head cool on your more demanding runs. On the rear, you can adjust to your ideal fit with the ethereal back closure, and the ethereal integrated brim keeps your eyes shaded from the sun.