Compatible head circumference: S - 21.8 ft (55.5 m) - 22.6 - 22.6 inches (55.5 - 57.5 cm), L 22.6 - 23.4 inches (57.5 - 59.5 cm), insect-repellent, sweat-wicking, quick-drying, and UV protection. Extra long cuffs provide extra wrist protection. Thumb, index finger and middle finger allow you to operate the touch screen while wearing gloves.