Seaskin Wetsuit Tops 3mm for Mens (X-Small, Mens Tops)

My son swims daily and often is very cold and turns bluish in his lower arms and hands. He is very thin! This jacket has helped quite a bit. The construction and zipper are very sturdy. The only issue is he uses it in a health club with chlorine and the color and fabric finish has changed quickly. Probably would be better in fresh water🤔 No fault of the jacket.