Hatland's No Wind technology is a unique feature that ensures optimal protection against wind and cold. This innovative technology uses a special windproof layer integrated into the hat, which prevents cold wind from getting through. This makes the hats with No Wind perfect for use in harsh weather conditions, whether you are hiking in the mountains, riding a bike, or just walking around town. In addition to being windproof, the hats remain breathable, keeping your head comfortable and dry no matter what the conditions.