A helmet liner cap is a type of headwear that is designed to be worn underneath a helmet.
It is typically made from moisture-wicking materials such as polyester or nylon to help keep the wearer's head dry and comfortable.
Helmet liner caps come in a variety of styles, including skull caps, bandanas, and beanies, and are designed to fit snugly against the head.
They are commonly worn by motorcycle riders, cyclists, and other sports enthusiasts who wear helmets for extended periods of time.
These soft helmet liner caps can be applied for many indoor or outdoor activities, such as dancing, fitness, climbing, riding, racing, motorcycling, daily walking, hiking, running and so on; They are soft and comfy, which is great for sleeping