Sunday Afternoons Mens Adventure Sun Hat 100% Nylon DermaSafe: UPF 50+ Sun Protection - Sunday Afernoons' DermaSafe technology guarantees an Ultraviolet Protection Factor of 50+. UPF 50 is the highest sun protection rating available and prevents more than 98% of all UV rays. This advanced technology aids in the prevention of sunburn and long-term skin damage so you can enjoy your time in the sun, worry-free. Play all day at the beach, pool or just in the backyard, knowing that you'll be safe and comfortable with DermaSafe fabrics. FloatCore: Durable Brim Floatation - FloatCore brim technology uses optimal density foam to create lightweight, highly flexible and durable hat brims. The FloatCore brim technology allows headwear to effectively float in fresh and salt water. Ideal for water related sports and activities like fishing, paddling, boating swimming, etc. ShieldTek: Superior Repellency - ShieldTek delivers useful protection from weather, water, dirt, and muck that life in the outdoors guarantees to bring. A hydrophobic protective barrier is created between you and the elements, keeping your garment dryer and cleaner longer, allowing you to extend your time outdoors clean and comfortable. Wisp: Featherweight Performance - Wisp technology represents a line of sun protective headwear that has been engineered to be as light as possible, with weights under 3.5 ounces. This is accomplished by using a variety of featherweight fabrics and materials to create headwear so lightweight that it can be worn for hours on end day after day for extreme comfort and critical protection against the sun's rays. Hat Size - Available in size Small, Medium, and Large