I'm not sure if all versions of this suit are fully-lined, but the one I was sent is. I've had nothing but less than stellar results of fully-lined suits in the past. I find them to be too heavy, impossible to dry, and less-compressed.       I'm becoming more chiseled after having done a lot of lap swimming, and have dropped one waist size down since I bought the suit, so I've decided to wear this suit out before it's too loose to wear....Imagine my surprise that after twenty hours of exclusively chlorinated pool lap swimming that the suit is maintaining its shape; even more surprising; its color, too!  Also, this suit dries quickly way faster than the other fully-lined suit brands I have, I figure the fabric must have a lot to do with the surprising performance. What's best, though, is that in spite of the suit ready to become too loose, it performs very well in the water, and has enough compression to do the job. I'm hoping that Speedo will continue to make this suit.

This is the most comfortable brief I have ever bought and I have tried all other brands and other suits from Speedo too. This fabric is really the best for casual swimming or just hanging out at the beach.

Great suit ! True to size and comfortable. Cool color too! Great for pool lap swimming 🏊🏻‍♂️ or beach 🏖!