These Belgian Military Long Johns are made to modern specifications using advanced aramid fabrics. Designed to regulate body temperature in cold temps, wet or dry. Won't burn or melt when subjected to flame or sudden bursts of high heat. A great investment for camp, deer hunting, or just busting down your to-do list in a drafty garage or workshop. Aramid blend won't burn, melt or drip Elastic waist and ribbed cuffs Machine wash and dry