CE Safety Standards: This fashion bicycle helmet is made of high quality ABS hard shell and EVA buffer layer material, with high strength, great impact and shock absorbing protection, supports cycling. Hat Shaped Helmet: The Hat Type Helmet for women, wide brim design, provides great sun protection for hot summer. Ventilation Comfortable: This cycling helmet with vents, lightweight, breathable, keeping you cool and drying, long time comfortable wearing. 58cm to 60cm Adjustable: The adult bike helmet is designed with adjustable chin straps, head circumference can be easily adjusted for different head sizes. Wide Using Applications: This stylish bicycle helmet is widely suitable for everyday wear, commuting to school or work, outdoor travel, cycling, biking, riding, etc. Besides, it is also a great gift choice for outdoor lovers. Specification: Material: ABS EVA Cotton Size Chart: Adjustable Head Circumference: 58cm-60cm or 22.83inch-23.62inch Hat Depth: 10cm or 3.94inch Hat Brim: 8.5cm or 3.35inch Back Brim: 5.5cm or 2.17inch Package Includes: 1 Surf Bucket Hat 1 Hard Shell Note: Please allow slightly errors due to manual measurement and different monitors.