Panama Jack Castaway Safari Boonie Sun Hat UV PROTECTION-The UPF50+ rating on this product's close-weave material* will block 97.5% of the sun's UV rays, so don't forget your hat when enjoying the outdoors and remember to wear sunglasses and sunscreen. PACKABLE & LIGHTWEIGHT- Rolled up convenient to carry and absolutely save lots of space. It is a perfect hat for beach, pool, park, fishing, hiking, camping, travel, hunting, gardening or any outdoor sports and activities. SECURE- Quickly and easily get this tactical men's boonie hat on and know it will stay on with the adjustable chin cord. The wind will not take your hat or your day away. BREATHABLE- The amazing bucket boonie hat is made is integrated mesh to give the wearing the comfortable feel and making breath-ability. PERFECT FIT-To find the perfect Panama Jack hat in your size, measure the circumference around your head just above your ears where the hat is expected to sit. You can then use our hat sizing chart in images to determine the best fit. If your measurement falls between sizes, choose the next largest size. If you have any questions, please feel free to call us at 1-800-840-5225 and we'd be happy to help.