Aqualung's 4-way stretch neoprene is the secret to a truly comfortable wetsuit experience. This suit will leave you feeling warm and able to appreciate your surroundings instead of having to focus on an uncooperative and uncomfortable wetsuit. The Aqua Flex's innovative kidney insulation offers amazing comfort for your lower back and additional insulation in one of your body's heat-loss areas. Aqualung kept the diver in mind when creating the shape of their wetsuits; the pre-bent knee areas allow the suit to move with you, instead of against you. The spine pad and user-friendly wrist and ankle seals ensure your comfort and warmth.