This is the best wetsuit you can get for cold water.

Features:
• The body is made of the Yamamoto GIGA # 40 neoprene inside and outside the suit with SCS all over inside and outside. GIGA # 40 neoprene is extremely flexible and supple giving the wetsuit even more comfort and flexibility when you swim. The inside shoulders and arms are made with the Ultraflexibility textile for maximum flexibility.
• Wetsuit Thickness - 2mm on the shoulders and arms and 5mm on the body.
• For the first time in the history of Triathlon Wetsuits, a wetsuit has been made with the Metal Cell technology incorporating the GIGA #40 neoprene on the body of the suit inside and outside.
• The Cell Gold will have the GIGA #40 on the inside and outside the body of the suit making it more flexible, supple, and comfortable to swim with. The Metal Cell technology like previous Metal Cell models from Aquaman will have SCS incorporated in the neoprene to make it slick in the water and to allow very fast removal of the wetsuit in transition. With the Metal Cell technology, which doesn’t allow much water in the suit you will stay warmer and swim faster since you will carry less water in the wetsuit.