Warmth
Wetsuits come with neoprene material, and the thickness of this material varies from suit to suit. The thicker the suit the less the performance will be, but it will keep you warmer, hence select a suit which has a combination of 3, 4, and 5 mm neoprene during the winter season, and a suit that has 2 and 3 mm neoprene combination for the summer season.