100% Polyester Hook and Loop closure Hand Wash and Line Dry One Size Fits Most: Our 6 panel performance hat adjusts to fit hat sizes 6 5/8 to 7 3/4 or 20 3/4” - 24 1/2" circumference. The back strap with hook and loop closure makes this hat easy to tighten or loosen. Moisture Wicking: This 100% polyester hat is equipped with premium moisture wicking fabric. The proprietary NB Dry moisture wicking sweatband will stay cool and dry during your most intense workouts. Reflectivity: The reflective New Balance dry screen-print allows visibility for your runs or walks in the dark. The low-profile silhouette and structured brim gives the hat a stylish and trendy touch. Ultra Light: This super lightweight performance sports cap is suitable for regular daily use and outdoor activities. This is the perfect hat for fishing, hiking, traveling, cycling, and skateboarding. Super Breathable: The light polyester mesh construction means air flows freely and allows your head to breathe. You'll never want to wear another hat again!