REI Airflyte Beanie
Here's what other sites are saying:
Keep your head warm without overheating while you're running, biking and hiking in cool weather with the REI Airflyte beanie. Stretchy polyester/spandex fabric breathes well and wicks sweat off skin. With a UPF 50+ rating, fabric provides excellent protection against harmful ultraviolet rays. Reflective hits front and back increase visibility in low light.