Tilley T4MO AirFlo Hat

Our sun-protective Hiker's Hat is designed with an evaporative cooling insert, powered by HyperKewl™, to help relieve heat stress during treks. A rear brim loop provides a place to securely clip your Hat in place when not in use. These unique features, plus all the usual Tilley® Hat benefits make this the ultimate Hat for the trail.


  • Maximum sun protection - fabric is certified UPF 50+, the highest given

  • An abundance of shade - broad brim protects from both sun & rain

  • Keeping cool - the HyperKewl™ Evaporative cooling material absorbs & slowly releases water through evaporation to help ‘super charge’ the body’s natural cooling process

  • Guaranteed for life

  • 3/4" mesh insert around the top provides extra ventilation

  • Front & back wind cords system secures Hat in gusty conditions

  • Water-repellent finish keeps off the rain

  • Pocket in crown holds the insert and is made with mesh to help increase airflow for maximum evaporation

  • Buoyancy – stays afloat in water

  • A rear brim loop provides a place to securely clip your Hat in place when not in use

  • Made in Canada

Brim size: Front & back: 3 1/2”; Sides: 2 1/2”

Under brim color: Khaki under brim is Olive. All other colors have the same under brim color as body of hat

Weight: 3.8oz / 108 grams

Manufacturing: Hat made in Canada , HyperKewl insert made in China

Fabric: Hat: 98% organic cotton; 2% spandex - lightweight, breathable, sueded for a soft touch & with some give for a comfort fit HyperKewl™ Evaporative Insert: 100% polyester mesh on the outside; interior is 53% polymer fibres; 47% cellulose fibres

Care: Remove HyperKewl™ insert before washing hat. Machine wash in cool water, delicate cycle or hand wash; lay flat or hang and air-dry. Do not wring out, do not bleach, do not iron, do not dry clean.

How to use your HyperKewl™ Evaporative Insert: Soak the insert in cold water for up to 5 minutes – insert into the Hat. The airflow through the mesh panel will start the evaporative cooling process. The cooling insert is expected to provide temperatures that are approx. 10 to 15 degrees Fahrenheit cooler than ambient temperature depending on airflow. It will not feel like an air-conditionner on your head – it will super charge the natural evaporation process to help you feel comfortable on the trail. High humidity will diminish the fabric’s ability to evaporate water.

Price: $99.95

Sizes: 7 1/4