A hat cap, commonly known as a cap, is a headwear item designed for protection, style, or both. Typically made from materials like cotton, polyester, or wool, it features a structured crown and a stiff bill or visor to shield the face from sun or rain. It often includes an adjustable strap or elastic band at the back for a custom fit. Available in styles like baseball caps, snapbacks, or trucker hats, it may have logos, embroidery, or patterns for personalization. Caps are popular for casual wear, sports, or outdoor activities.