Features: Ice silk fabric, excellent breathability and moisture wicking function, which can keep the head cool and comfortable even in hot summer. Specially design for outdoor sports, with quick drying characteristics that can quickly absorb and evaporate sweat, keep the head dry. Offering multiple color option, each color can easily pair various sports equipment and casual wear, showcasing your fashion taste. Suitable for multiple scenario and functions, not only suitable for cycling, but also for various outdoor activity such as running, hiking, and traveling. The size is 26x15cm, ensuring that the hat fit snugly against the head and is not easily slipped off. Whether used as a helmet lining or wear alone, it can provide good fixation and daily comfort. Specifications: Fabric: ice silk fabric Color: black, gray, white, blue Size: approx. 26x15cm/10.24x5.91inch, elastic and suitable for most head shape, comfortable to wear and not tight Use scenario: Suitable for outdoor cycling, sports and fitness and other summer activity to improve protections and daily comfort Package Includes: 1 Piece Helmet Liner Hat note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.