Material: Silicone Size: 1.1*0.9cm / 0.43"*0.35" Color: as shown 1. [Hair Style Protection Design] The unique inner lining effectively prevents your hair from collapsing, ensuring it maintains its perfect shape even after a ride. Designed for those who value appearance. 2. [Breathable Ventilation System] The porous structure enhances air circulation, ensuring a cool and comfortable fit even after long periods of wear, effectively reducing stuffiness and sweat buildup. 3. [Comfortable Massage Points] The inner lining features soft massage beads that conform to the scalp to relieve pressure and enhance wearing comfort, making it suitable for long rides. 4. [Universal Fit] Compatible with a variety of motorcycle, electric bike, and bicycle helmet brands and models. Easy installation, adaptable, and cost-effective. 5. [Easy Cleaning and Removable] The inner lining is removable for easy cleaning and maintenance, ensuring hygiene and extending the life of the helmet, ensuring both health and practicality. Package Includes:3pcs or 5pcs Helmet Insert Liner