Mike and his crew outfit about 2500 people going to Antarctica every season. If all 4 layers of the clothing are worn, a person can be comfortable to about -100oC, temperatures that are sometimes reached during the winter in remote areas like the South Pole. Interestingly, even with the enormous capacity for these clothes to maintain body heat, none of the garments are waterproof. No need to be, Antarctica is a desert. The inner layers of issued clothing are made of wool and polypropylene fleece.
Outer layers are parkas or pants of thickly quilted down, with a nylon shell covering.
Top layer clothing is red so people can be easily seen on the ice in case rescue is required. Working is the harsh condition of Antarctica is hard on clothing. At the CDC one person is employed full time just to repair articles as they come in. Gloves have a life of one trip to the ice, socks 2 or three, parkas last about 3 seasons. Each year the center auctions off the retired clothing which can no longer be counted on to protect the scientists and workers.