Sun protection hard hat: the arc and neck protection hard hat liner can protect your neck and ears from heat and hot sun; The material is soft and flexible, which is designed to keep you cool and comfortable Absorbent and sweat wicking: the hard hat neck shade is comfy to wear, helping absorb the sweat, covering your neck from the sun, and keeping the sweat out of your eyes, providing you with breathable and comfy wearing experience Soft and durable material: the elastic hard hat neck protectors are made of silk ice fabric, which is reliable and durable, soft and breathable to wear, friendly to your skin when draping around the back of your neck and ears; You can soak the neck protector in water to add more cooling effect while others put it on their head and forget it's there; One size fits most hard hats Fit under the hardhat without burden: the hard hat liner fits on your head underneath a hard hat, the hard hat liner is soft, and skin-friendly, which can make you relaxed without burden Wide range of application: the good elasticity makes hat liner fit for most people and head circumference; The elastic hard hat neck sun shade can give you a good protection, it can be applied as a sport cap for different outdoor activities, such as fishing, riding, golfing, hiking, traveling, camping and so on, making your sport time more relaxing and enjoyable Head circumference: 48cm Material:Ice silk colour:Photo Color Package Contents: 1 * black inner cap 1 * white liner cap 1 * gray liner cap Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.