Armycrew Big Oversized Jungle Boonie Bucket Hat with Chin String Fits Upto XXXL. 100% Cotton. Durable and comfortable outdoor boonie hat perfect for any activities. 4 big meshed brass eyelets are featured on both sides for ventilation. 2 snap buttons are features on both sides so you can snap/unsnap brim to the side of crown for 2 different styles. Flexible and crushable material, easy to pack. Our XL/2XL hat measures around 23 1/2 to 24 3/8 inches. 2XL/3XL hat measures around 25 1/8 to 26 inches..