First layers, or base layers, are an extremely important part of the layering system. Most winter climbers choose a thin, wicking material, one that doesn’t cause over heating, and that allows moisture to pass through easily. This keeps skin dry during activity. Once the body begins to perspire, moisture can quickly cool body temperatures and once activity slows, people find themselves cold and miserable. Avoid cottons. While cotton is comfortable when dry, once it is wet it looses its benefits completely. Performance companies like Patagonia produce excellent base layers that are durable and comfortable.
Fleece, Fleece and more Fleece
Second or middle layers are the insulating part of the system. Materials like fleece have impressive body heat retaining properties. Fleece sweatshirts, zip-necks and vests will keep internal temperatures higher than most other materials, even when wet. Merino wool is also nice. Adding or subtracting these middle layers is a great way to regulate body temperature. Companies like Marmot, Cloudveil, Patagonia and others make terrific middle layers that are fully functional in the mountains, or very comfortable while running errands
Wind and Watertight is Right
Outer layers, pants and jackets, should be thin, wind and water resistant fabrics. Currently, many companies are producing soft and hard shell fabrics. Soft shells are made of fabrics like Schoeller Fabric, which are pliable, and move with the human body well in sports like climbing and skiing. Hard shells are stiffer, and may not move as well but have incredible weather resisting qualities. Gore Tex Material is thin, and very near to 100% waterproof, and breathable, allowing heat and moisture to escape membranes, but not allowing any to enter. Gore Tex and Schoeller are available from a number of manufacturers. While shopping for outerwear, remember to leave room for layers underneath.
Feet and toes get cold in snowy mountains. Layering with a thin synthetic sock below a thicker merino wool or other quality material will make an enormous difference, especially while wearing thick boots that don’t breath as well as other outer layers on the body.
A nice warm hat is similar to adding a mid layer on the body. They are easy to help regulate body temperatures, and can make a convenient difference as opposed to stopping and removing clothing. Keep a wool or fleece lined hat handy on hikes or for when the temps begin to drop.
Gloves should keep hands dry and warm, but allow dexterity. Mittens are perhaps the warmest option, but decrease use of fingers.
Following these suggestions will add to the enjoyment of the winter outdoors. In Colorado and any mountainous region, weather changes rapidly and the more prepared, the better the fun.