This outdoor mosquito net sun hat is crafted from lightweight quick-drying nylon fabric with certified UPF50+ UV shielding performance, and its sun protection effect will not weaken after repeated washing, perfect for long hours under strong sunlight. Equipped with a stiff 12cm wide brim, it delivers full face shading to block direct ultraviolet rays, while the 25cm extended neck flap offers comprehensive coverage for the back of neck to prevent sunburn. Both sides of the hat and the hat top adopt breathable woven mesh vents, which speed up heat dissipation and avoid stuffiness even in hot summer weather. A full-surround fine dense transparent mesh covers the entire face area, effectively isolating mosquitoes, bees, flies and all outdoor bugs to prevent painful bites during gardening, fishing, beekeeping and hiking. The hat comes with an adjustable drawstring inside to fit head circumferences ranging from 55cm to 60cm, suitable for most adult head sizes; an extra windproof lanyard at the bottom of the mesh can be tightened to fix the hat firmly on the head, stopping it from blowing off on windy days. The integrated soft mesh and fabric structure can be folded compactly for easy storage in backpacks, fishing bags or garden tool pouches without taking extra space. The smooth nylon material resists dirt and water splashes, only requiring simple rinsing to clean mud, sweat and dust after outdoor work. This multi-functional headwear combines UV sun protection and full insect isolation, widely applicable to fishing, camping, hunting, backyard planting, beekeeping and all outdoor summer activities. It maintains stable wear comfort for all-day outdoor work and leisure, serving as an essential practical accessory for all outdoor enthusiasts.