The Dr. Shade Outback Hat offers 30 sun protection while a cool strip of mesh at the top of the crown offers 360 degree air flow for cooling comfort. This well designed sun hat is a must at the beach, or on the water. Great for fishing, hiking or paddling. Mesh strip at the top of the crown for cooling air flow. Khaki hat has dark green under brim to reduce glare. Buttons on brim can be snapped against crown to change the style. Strap in back of hat holds the optional Dr. Shade Universal Sun Shade in place Campmor Item 63486. Chin strap can be worn for windy days.