1. [Why choose this product? 】Reasonable design, our high-quality cotton fabric, wears warm, the fabric is soft, and feels comfortable.2. Exquisite sewing thread increases durability. This hat is soft, warm, breathable and light weight. You can use it as a winter hat, ski hat, running hat, sleeping hat, etc.3. Adopting engineering principles, the overall force is even, and it fits the head contour, making the wearing experience more comfortable.4. Unique antibacterial treatment can effectively inhibit the growth of bacteria, avoid potential harm, and wear it more securely.5. Hand wash with cold water; or clean locally; or machine wash delicately, shape immediately, and then air dry.