Matching your camo clothing to the temperature where you will be hunting is one of the most important considerations. Just try hunting in insulated camouflage coveralls when it's 80 degrees out and you'll know why. If you'll be doing most of your hunting in warm weather, you'll need lightweight shirts and pants, and maybe even a light jacket. For very cold weather, you'll need not only base layers on top and bottom, but a heavier shirt, pants and a warm, insulated jacket. Most hunters will need at least a couple sets of camo, since they'll be hunting in fairly warm weather early in the season, then colder weather as the winter progresses.