Protective cap for cold and windy work conditions�� Optimal head protection in cold and extreme environments.�� Lower section in Windstopper offers thermal insulation against cold and wind.�� Designed for wearing under a helmet.�� Upper section is breathable, to limit perspiration inside the helmet.�� Seamless, fitted design for optimal comfort with the helmet.�� Does not get in user`s way during everyday work.�� Lateral slots in front of the ears ensure hearing is not impeded.�� Machine washable up to 30� C.�� Available in two sizes.