When it comes to running hats, there are a few key things to look for: breathability, a comfortable fit, and sun protection. Here are the five best running hats, based on these criteria.

1. The Nike Featherlight Cap is made with a lightweight, breathable fabric and has a comfortable fit. It also has a visor to protect your eyes from the sun. This hat is available in a variety of colors and costs $19.99.

2. The Under Armour Play Up Cap is also made with a lightweight, breathable fabric. It has a comfortable fit and a visor to protect your eyes from the sun. This hat is available in a variety of colors and costs $24.99.

3. The adidas Running Supernova Cap is made with a lightweight, breathable fabric and has a comfortable fit. It also has a visor to protect your eyes from the sun. This hat is available in a variety of colors and costs $29.99.

4. The Brooks Running Essential Cap is made with a lightweight, breathable fabric and has a comfortable fit. It also has a visor to protect your eyes from the sun. This hat is available in a variety of colors and costs $34.99.

5. The Saucony Bullet Cap is made with a lightweight, breathable fabric and has a comfortable fit. It also has a visor to protect your eyes from the sun. This hat is available in a variety of colors and costs $39.99.

All of these hats are great options for runners who are looking for a breathable, comfortable, and sun-protective hat. The Nike Featherlight Cap and the Under Armour Play Up Cap are the most affordable options, while the Saucony Bullet Cap is the most expensive.