Ergodyne Chill-Its 8935MF Evaporative Cooling Microfiber High Visibility Ranger Hat, Large/X-Large LONG LASTING INSTANT COOLING RELIEF Can last for up to 3 hours on a single soak. Simply re-wet to increase cooling duration EASY TO USE AND ACTIVATE Run under water for about a minute, twirl in the air, and it's cool! Wear for drip-free cooling relief as temperatures rise. COMFORTABLE COOLING MATERIAL Inner rim lined with soft, absorbant, evaporative material that is lightweight and provides the optimal cooling comfort DURABLE AND REUSABLE Product can be re-used over and over again. Let air dry, re-wet when ready to use! Can be machine washed easily with like colors HIGH VISIBILITY Made with ANSI certified polyester and reflective tape for increased visibility protection MACHINE WASHABLE