This model of undergarment is ideal for cold water diving. It is made from 400g thinsulate which performs better than fleece and insulates even when wet. This is the warmest non electric undergarment on the market. Size ML and tailored for someone 6'3", 185lbs. Would be comfortable for a smaller person too. New condition - used on only 3 dives. See Santi website for all features. Normal retail price is $850. https://santidiving.com/bz400x,169,en