Size19.5*21.5CM Head Protection: Our motorcycle helmet insert insulates the scalp and helmet, reducing extensive contact with the scalp, keep your scalp soothed, clean and healthy with our reusable helmet liner while ensuring your helmet is not damaged by sweat or Hair product stains. Extends the life of the helmet and is one of the must-have items for your summer outings. High Quality: Our motorcycle helmet padding is made of silicone material with moderate softness and hardness, which can effectively support the hair without damaging the scalp. Transparent silicone nails are elastic and soft and have a massage effect on the scalp. Comfortable and breathable, prevent odor, reduce sweating, maintain hairstyle, soft and easy to clean, and not easy to deform. Ideal for Outdoor Activities: Whether you use a batting helmet, bicycle helmet, motorcycle helmet, baseball helmet, football helmet or any hard helmet. Our helmet pads are universal, one-size-fits-all. Each liner is crafted for helmets used in outdoor activities like biking and skating. Easy To Install: no need to install with Velcro, just press to install, convenient and simple, and use more worry-free.