Special design suitable for wearing under helmet, hard hat or alone: say goodbye to odor, sweat and itching. Our breathable skull cap helmet lining can protect your skin and prevent sweat. Ensure a comfortable feeling!Cooling function and sunscreen protection: by soaking the skull cap in cold water, tightening and fastening it, you can start using it. Imagine making you feel the best in the hot summer while avoiding the damage of the sun!Where to wear it? You can choose, it is one size fits all: walking, hiking, jogging, running, exercise, cross training, cycling, fitness, tennis, dancing, basketball or anything you can think of! Are you a construction worker? Increase the comfort of your head and put our moisture wicking helmet lining under your helmet!