Neck support contours to your neck, preventing a sticky and stuffy feeling during long wear Five wind gears, two air inlets, and 80 air outlets provide 360-degree cooling and improved air flow for maximum comfort Quiet operation under 25dB makes it ideal for spaces like libraries, schools, office, gym, and outdoor activities 4,000mAh battery provides five hours to 15 hours of use and fully charges in just two hours for all-day convenience Upgraded design enhances safety by preventing slippage on the neck and avoiding hair entrapment Suitable for people of all ages