This product is made of durable materials. Suitable for full-time outdoor workers in low-risk workplaces, it is compatible with baseball caps and provides head safeguard. It will be practical and creative to use, supports the caps and is not easily deformed. It can perfectly keep the shape of your and provide you with a . This bump caps liner can safeguard your head from head injury. Features -Color:Black -Material:ABS, Plastic -Size:20.00X18.00X10.00cm/7.86X7.07X3.93in -The simple design brings of convenience to your daily life, and is also very practical and easy to use. -Lightweight Bumper Caps inserts, a combination of fashion and safety, dynamic, creative, highlighting individual style, suitable for automotive assembly, maintenance, machining, industrial manufacturing and other fields. -Lightweight baseball caps bumper inserts are comfortable and stylish head protection. Crash-proof inserts fit inside most baseball caps and are suitable for outdoor workers in low-risk environments. -It will and secure to use. Well-made, smooth and surface can ensure its popularity and practicality, beautiful appearance and good workmanship. -It can be directly assembled chin rest or used with headband, with reinforcement inside, good protection function, very suitable for various activities that need light head protection. Package list: 2 Liner