TILLEY T5MO ORGANIC COTTON AIRFLO HAT One of our lightest weight hats, this organic cotton Airflo hat has a soft, sueded finish and a 3/4 inches mesh for great breathability. The hat packs very well and regains it's shape well after packing. DISTINCTIVE FEATURES Floats - foam liner in the crown adds buoyancy Front and back wind cords system secures hat in gusty conditions Hydrofil sweatband to wick moisture away Grommets for extra ventilation. Each Tilley Hat is uniquely designed for ultimate comfort, temperature control and durability through the seasons. All Tilley hats are hand-sewn and all seams are lock-stitched so they won't unravel.