Under Armour cap. I bought this for running and have worn it twice, storing it at home since. It's in clean condition with no signs of use, but please understand that this is a used item and review the photos to confirm the condition before purchasing. It will be folded and shipped in a size that allows for Yu-Packet Post. Here's the product description: ----- This cap is designed to keep your head cool by dissipating excess heat. The special ventilation holes that release heat are designed to be narrow so that sunlight doesn't become a problem. "ArmourVent" by UA mesh technology, which simultaneously achieves breathability, lightness, stretchability, durability, and quick-drying properties. Uses a material with excellent sweat absorption and quick-drying properties. The front panel and sweatband wick away sweat, keeping you cool and dry with Iso-Chill technology. UA Classic Fit features a pre-curved visor and a structured front panel to prevent deformation, providing a clean fit. ISO-CHILL: Aqua X nylon threads absorb and release body heat, preventing temperature rise and keeping you comfortable even in extreme heat. Head circumference: 57.8cm Thank you for viewing. Color: Black系 (Black-based) Stains, tears, odors, etc.: None