The OccuNomix Sherpa Lined Insulated Winter Hard Hat Liner SS550 is engineered for professionals who need dependable warmth and protection in extreme cold conditions. Made with a 100% cotton twill outer shell and a soft Sherpa lining of 50% acrylic and 50% polyester, this liner offers superior insulation and comfort. Dual Tyvek™-lined warming pack pockets enhance heat retention, while an elastic band ensures a secure, comfortable fit under hard hats. A reflective strip on the back improves visibility in low-light environments, making this liner ideal for construction, utilities, and industrial work.