Hi, I have a Poseidon Besea that is in great shape. It is the w100 so it has plenty of lift for whatever you are doing. It has not been used very much and 95% of the dives were in fresh water. It comes with the quick release weight pouches and lots of rings for gear. It really doest have a size marking but you can adjust it in so many was that it should fit just about anyone. Feel free to ask any questions. Im asking $475 or best offer. Thats almost half of what they sell for new. Please, only ask for pictures and such if you are really interested in buying it. Thank you.