Tilley Size 7 5/8 or 23 7/8 in. Unisex T5MO Organic Cotton 。EUC. The Airflow Tilley Hat - Size 7 5/8; Model LTM5. The perfect hat for your adventures into the great outdoors, the Tilley LTM5 Airflo Nylamtium Hat is built to keep you cool and comfortable and is guaranteed for life. Made with Tilley\'s own Nylamtium fabric, the LTM5 Airflo is water and mildew repellent, and dries amazingly quickly. The polyester mesh in the crown adds plenty of ventilation, even during long days in the sun, and the wide brim design provides protection when you\'re traveling in unprotected terrain. So whether you\'re heading out onto the Pacific Crest Trail or heading out to the badlands to volunteer on that dinosaur dig, bring along the Tilley Airflo Nylamtium Hat and stay protected and comfortable. Key Features: Guaranteed for life not to wear out Excellent sun protection, rated UPF 50+ Repels rain, floats Machine washable, won\'t shrink Secret pocket Insured against loss Dark underbrim for glare protection Ties on in the wind Medium brim with ¾\" ventilation mesh