Ergodyne - EGO16818 Snug-fitting knit cap with soft fleece liner feels and looks great. Thinsulate flex insulation makes it great for use in construction, freight/baggage, drilling/mining, oil/gas refining, iron/steel work, delivery/service, landscaping/grounds, cold storage/warehouse and material handles. N-Ferno 6818 Knit Cap is made with a 100 percent Dralon acrylic shell.