This wet suit is top of the line. Best wet suit on the market. made for frigid water the chest and back are rated at 5mm, legs/arms 4mm, and hood 3mm. Neoprene line with chlorine-free merino wool. Ill will be seelling this item well below actual retail price and what other sellers are asking, not because of anything wrong with the suit, i received it as a gift and have no use for it. Thank you and if u have any questions please feel free to contact me.