Wide brim, comprehensive sun protection The width of the brim is 10cm, 360 wrap-around coverage of the face, neck and behind the ears, effectively blocking direct UV rays, reducing the risk of sunburn, pigmentation and photoaging, especially for long outdoor activities. UPF50+ Sun Protection Certification Adopting professional sunscreen fabric, the UV protection factor reaches 50+, which can block more than 99% of UVA/UVB, and passes the international sunscreen testing standards, the sunscreen effect is real and reliable. Breathable heat dissipation, refusing to be stuffy The top of the cap is designed with ventilation holes or adopts hollow weaving process to accelerate air circulation; the inner lining is made of sweat-absorbing and quick-drying material, which can quickly export sweat, keep your head dry and avoid the feeling of stuffy heat and stickiness. Lightweight fabric, no burden to wear The outer layer is made of tear-resistant polyester or sunscreen-coated nylon, weighing only about 120g, making it lightweight and portable; the inner lining is made of skin-friendly cotton or ice silk, which is soft and does not irritate the scalp.Adjustable to fit your headBuilt-in elastic drawstring or Velcro adjustable band around the hat, support 54-60cm head circumference free adjustment, wear stable and not easy to fall off, suitable for different head shapes.Windproof and reinforced, worry-free outdoorBuilt-in shaping wire in the brim, can be freely bent and shaped, not easy to deform in windy weather; some styles are equipped with windproof rope to prevent the hat from being blown off during outdoor sports.