CE Safety Standards: This fashion bicycle helmet is made of high-quality ABS hard shell and EVA buffer layer material, providing high strength, excellent impact resistance, and shock-absorbing protection for cycling. Hat Shaped Helmet: The hat-style helmet for women features a wide brim design that offers effective sun protection during hot summer days. Ventilation Comfort: This cycling helmet includes ventilation ports for lightweight, breathable performance, helping to keep you cool and comfortable during extended wear. Adjustable Fit: Designed with an adjustable chin strap, this adult bike helmet allows easy adjustment of head circumference to fit various head sizes from 58cm to 60cm. Wide Application: This stylish bicycle helmet is suitable for everyday use, commuting to school or work, outdoor travel, cycling, biking, and riding. It also makes a great gift for outdoor enthusiasts. Specifications: Material: ABS, EVA, Cotton Size Chart: Adjustable Head Circumference: 58cm–60cm / 22.83inch–23.62inch Hat Depth: 10cm / 3.94inch Hat Brim: 8.5cm / 3.35inch Back Brim: 5.5cm / 2.17inch Package Includes: 1 x Surf Bucket Hat 1 x Hard Shell Note: Please allow slight variations due to manual measurement and differences in display monitors.