"Weather Rating: VERY COLD Advantage Camo Thermal Drawer. Advantage Brown - One of the world's best selling and most popular camouflage patterns. ""Leave the Un-Natural World"" Extra heavyweight raschel thermal knit of 50% cotton, 50% polyester effectively traps and retains body heat for comfortable warmth. Reinforced flat seam construction for smooth fit and extra strength. Shrinkage controlled for lasting size and shape."