Coolibar UPF 50+ Baby Splashy All Sport Hat - Sun Protective Polyester/Spandex Blend UPF 50+ - protects against 98% of UVA and UVB rays Aqua SUNTECT&reg;: Chlorine and saltwater resistant with 4-way stretch Foam brim holds its shape yet is safe for baby; Circumference: 18 1/2 inches (6-12M), 19 1/2 inches(12-24M), 20 inches (2T-3T); 2 3/4 inch brim Moisture-wicking internal soft terry sweatband with 3 5/8 inch attached drape for neck protection; Cold rinse after use, Easy care: hand wash warm, line dry Recommended use for baby's splashy pool or beach days in and around the water