What is the version of the following sentence with correct punctuation?

Its ISOcertified for scuba diving and other extreme water sports An entirely special structure of very light titanium makes it fit for prolonged wears Additionally titanium has a high corrossion resistivity seawater especially thats double advantage
It's ISO-certified for scuba diving and other extreme water sports. An entirely special structure of very light titanium makes it fit for prolonged wears. Additionally, titanium has a high corrossion resistivity (seawater, especially); that's double advantage.