All-weather sun protection, hardcore protection UPF50+ high times sunscreen: using professional sunscreen fabrics, UV blocking rate 99%, effectively resist the scorching sun, outdoor sports are not afraid of tanning and sunburn. Large brim design: 7cm wider brim (some styles 9cm), 360 around the sun, full coverage of the face and neck, clear vision without blocking the line of sight. Breathable and quick-drying, comfortable and not stuffy Honeycomb breathable mesh: double-layer breathable design on the top + sides of the cap, accelerating air circulation, rapid evaporation of sweat, long time wear is still dry. Ice sensation fabric: contact with the skin instant cooling, summer outdoor sports with its own small air conditioning, goodbye to the hot and sticky feeling. Lightweight and wear-resistant, sports without worry Ultra-lightweight material: the weight of a single cap is only 80g (120g for some styles), which is as light as nothing, no burden for running, cycling, mountaineering and other strenuous sports. Tear-resistant fabric: high-density nylon + polyester fibre blend, wear-resistant and anti-build, branches scratching, accidental falls are not easy to break. Multi-functional details, thoughtful design ADJUSTABLE BACK BUCKLE: Metal buckle + Velcro double adjustment, head circumference 54-62cm freely adjustable, big head and small head can wear, solid and not shaking. Sweat-absorbent lining: Flocked sweatband on the inside of the brim, quickly absorbs moisture and perspiration to keep your forehead dry and avoid sweat from flowing into your eyes. Hidden storage: some styles have built-in hidden pockets in the brim, which can store keys, cards and other small objects, making it more convenient to travel light.