One Size Fits Most - Standard Head Size 6 - 8 (52-64 cm head circumference)Twiceme technology that allows first responders to access vital medical info and emergency contacts with a simple tap of a smartphone, Brim grip feature for security when holding hat, Five external built-in attachment points allow compatibility with a wide range of LIFT Safety accessories, Moisture wicking microfiber antimicrobial internal liner, Secure four-point connection with easy release magnetic lock, LUX Retention System has secure, adjustable fit that stays comfortable all day, Oversized ratcheting dial for easy size adjustment, even with gloves on, Imported,