This hard hat liner is made of cotton, with a polar lining. It has straps to attach it to the hardhat, a detachable mouthpiece with ventilation holes, and an adjustable bottom portion that covers the neck.
This hard hat liner is made of fire-resistant cotton, with quilted cotton lining. It has straps to attach it to the hardhat, an elastic band with Velcro underneath the chin, and a detachable mouthpiece with ventilation holes.