Buff Coolmax High UV Headband - SS18 Features: 98% UV protection, Polygiene, Coolmax, moisture management, dries quickly, comfort seams, reflective, odor resistant. Size: Designed to fit heads with a circumference of 53-62cm/20.8inches - 24.4inches and is 9cm deep and 25cm wide. Thermal Comfort - Cool. Ideally used for running, Stretchy Coolmax headband, 98% UV protection. Perspiration & humidity control. Comfort seams. Odor resistant. Some designs reflective. Machine washable and non iron.