Ciele unisex running hat. Measuring at 56.5 cm with an adjustable closure, the ALZCap running cap is slightly smaller than our GOCap and is designed for runners who wear a small/medium running hat. based off of the industry standard GOCap, the ALZCap has additional mesh coverage for more breathability, and features a lower profile for a more fitted look. each cap is designed to keep you cool, protected, and performing at your best. Machine washable