When you consider how much a diving dry suit costs, a minimum of $1000, you will want to seriously consider buying a thick wetsuit or even a two-piece Farmer John Style Wetsuit.
Many online dive sites do not even carry dry suits because a good wetsuit or even 6mm two piece farmer john wetsuit is just as good.. Most people buying dive equipment online are looking for deals, and for the least expensive equipment possible, and dry suits are very expensive. A decent dry suit is going to set you back at least $1000.
We found a great online dive store that sold semi dry wetsuits, and lots of thicker, budget-conscious wetsuits like the two-piece farmer john. A full dry suit insulates using a layer of air, as opposed to wetsuits which trap a layer of water against the skin. Air is a better insulator than water, so using a dry suit means you will not get chilled as fast as you would with a wetsuit in the same water temperature. You may still get a chill though unless you have some way of heating the dry suit. Some divers use hot air to heat the dry suit.
A semi dry suit may be the best solution if you want the benefits of a dry suit, but are unwilling to pay the steep price. The difference between a semi-dry and a full dry suit is unlike a full dry suit, you can’t inflate or deflate a semi-dry suit.
Buying second hand dive gear is one of the worst ideas. Who knows what the gear has been through? It’s not like you can go to something like DiveFax and find out its history. Buying new from a reputable online supplier means all your gear will work like it’s supposed to from the start.