Our unisex helmet liner is a must-have for anyone seeking comfort under helmets or casual warmth. Crafted with 4-way stretch fabric, it delivers ultimate comfort and a snug fit—ideal as a thin night cap or winter running hat for both men and women. Lightweight by design, it keeps your head warm without overheating, even on windy, cold evenings. For those with bald or short hair, it's so unobtrusive you might forget you're wearing it during walks or runs. Perfect for frequent helmet users (bike, motorcycle, hard hat), its soft material relieves heat, itching, and sweating. It strikes a smart balance between lightness and warmth: thicker at the ears (windproof) and thinner on the head, with flat seams that avoid extra head stress. Wear it alone or under a helmet—your head stays cozy. Easy to carry, it suits cycling, running, skiing, hiking, outdoor jobs, and makes a fantastic Christmas/birthday gift for outdoor-loving friends or family, regardless of gender.