Compression Pieces - compression leggings and jackets compress the skin the perfect amount to keep the circulation flowing and allow the body warm itself.
Avoid cotton and wool during workouts, because the sweat will stay on your clothing and cool you down even more in the long run.
Jackets - Don’t go with puffy jackets, stick to a more compressed style with moisture wicking to eliminate sweat build up.
Gaiters - It is hard to remember when gaiters were worn solely for warmth, but they are a cold weather workout must have to keep your head and mouth warm.
Gloves - Find a good pair of synthetic gloves as to avoid that moisture build up in the hands from cotton.