Made of durable material to support your hat, the safety liner is practical and creative to use and will not easily deform. The hat support can perfectly keep the shape of your hat and provide you with a . And this hat liner can also be used to safeguard your head, suitable for outdoor sports. Features -Color:White -Material:PE -Size:19.00X18.50X10.00cm/7.47X7.27X3.93in -With ventilation holes to increase permeability, lightweight and breathable without losing toughness, this Bumper Caps Liner has protection to prevent head injuries. -Can be embedded in a variety of caps shapes to meet your needs, with high toughness material anti-smash and anti-punch, lightweight bumper caps are suitable for a variety of activities that require light head protection! -Designed to fit the size and shape of the caps so that the insertion of the shell can be kept in place. Breathable and comfortable to wear, while preventing small bumps and scalp cracks. -Extremely easy to fit your head. The unique design also makes it suitable for both men and women. Indoor or outdoor workers at home or some workplaces. -Specially designed to fit the shape, more comfortable and reasonable with the . With details and good workmanship to make it more safe and durable. Package list: 1 x Liner