Enforce X High features a waterproof and breathable CROSSTECH^® inner liner which offers an additional layer of protection from potential biohazards your customers might encounter on the job like blood, body fluids and chemicals. It’s sister boot, the Enforce X High Winter, features a waterproof inner liner that offers 500 g/m2 of insulating comfort for those cold winter months. Those that purchase both would essentially have both a “Summer” and a “Winter” boot, perfect for those who live and work in varying climates.