When the weather turns colder or the water is cooler, you’re going to want to have a base layer of insulation on when you go out paddling , sailing or surfing. If you’re going to be wearing a wetsuit, then a thermal rash guard is a good option. Not only will it prevent chafing from the wetsuit, but it gives you a little extra insulation for warmth keeping your core warmer. A decent thermal under a kayak jacket can make all the difference in Autumn. Thermal watersports base layers work much like conventional thermal underwear. They are brilliantly versatile - equally at home under your wetsuit , ski jacket or waterproof when walking the dog. Layer up or down to regulate your body temperature and enjoy the great outdoors for longer.