Product Name: Pilot Headgear Material: COOLMAX Quick-Dry Mesh Fabric Weight: 0.04kg (each) Packaging Size: 17 * 11 * 0.5 cm Packaging: PE bag (single piece) Product Introduction: Used inside helmets to address sweat-induced heat, humidity, and coldness, keeping the head dry and comfortable. For products with available sizes, we will attach an accurate size chart for you to choose and purchase. The following product details are some explanations of the product situation, which can solve some of your questions and enhance your shopping experience. Due to different shipping batches, there may be slight differences in the outer packaging of certain products. We will provide users with aesthetically pleasing and high-quality outer packaging without affecting product quality Due to the layout of the product page, SKU images in some products may display multiple products of the same style or SKU images that differ from the specification description. SKU images are for reference only. If the specification description does not specify, the quantity of goods in the specification is 1 piece. If the SKU image does not match the product specification description, the product description shall prevail. If you have any questions in this regard, you can contact us via email and we will promptly and accurately resolve your concerns. [Product Testing]: Before shipping and packaging, our company will also test each item to ensure that you receive the product without any problems.  Please communicate with us via email if you have any questions, and we will reply to your questions as soon as possible to ensure that they are resolved and avoid any unpleasant incidents. Thank you for choosing our product!!!