6630 Skull Cap is a low-profile cap featuring a wide, absorbent, terry cloth sweatband to manage perspiration away from your eyes, face and glasses. Hi-Cool moisture-management fabric is stretchy enough to fit most heads and can be worn under a hard hat or on its own to provide sun-blocking protection. Cap is great for construction workers, landscapers, roofers and more. Wear this skull cap to reduce the risk of heat stress while mountain biking, motorcycling, gardening, hiking, playing sports and more. High-visibility lime increases visibility in low-light environments.