The Henschel Aussie Breezer Hat is renowned for its breathability and packability. The mesh crown lets the air flow through to keep you cool on warm, muggy days. Plus, it makes the hat crushable so you can easily pack it in your bag for weekend trips. And it also has UPF 50 protection from sun rays. For cool, sun-blocking comfort, it's a breeze. Made in USA; Polyester/cotton construction; Breathable mesh crown; UPF 50+ certified sun protection; Chincord; 3" brim; Crushable; Small: fits hat sizes 6 3/4 to 6 7/8, head measurement 21 1/2"; Medium: fits hat sizes 7 to 7 1/8, head measurement 22 1/4"; Large: fits hat sizes 7 1/4 to 7 3/8, head measurement 23"; Extra-large: fits hat sizes 7 1/2 to 7 3/4, head measurement 23 7/8"; Double Extra-large: fits hat sizes 7 7/8 to 8, head measurement 24 5/8"; Mfg. Number: 5310