Premium material: The sun visor hat is made of high-quality polyester that is breathable, skin-friendly, and sweat-absorbing. It helps you stay cool without feeling stuffy, with a breathable mesh for added comfort. Unique retractable brim: The brim can be extended or retracted to provide full protection for your face. Edges can be adjusted to your preferred coverage. Material: Polyester. Fastening method: Elastic for a secure, comfortable fit. Adjustable size: Fits head circumference 55-60 cm (21.7-23.6 inches). Back features adjustable shoulder straps for a customizable fit, suitable for most girls, teens or adults. Anti-perspirant headband: Sweat-absorbent with an anti-perspirant line to prevent sweat from slipping, helping you focus on training without wiping sweat. Use scenarios: - Outdoor running or cycling in sun: shields face and eyes while keeping you cool. - Outdoor workouts (golf, tennis, workouts): comfortable, adjustable fit with reliable sweat management. - Hiking, beach days, or other outdoor activities: adjustable brim and back straps accommodate different head sizes and sun exposure needs.