I use these for lap swimming, as drag shorts, to add resistance during training. Because these are board shorts there there is NO LINER but that is a feature, not a downside. This enables you to wear swim briefs or jammers underneath so that — when it is time to race — you can easily remove the shorts and have another suit underneath all ready to go. No need to get out of the pool to change outfits.
The material dries quickly. They become more dry than even my swim briefs or jammers after spinning them in the swimsuit dryer. After swim practice is done, I'll wear them in the car on the way home.
Lastly, they look great! They are neither too long, like most boardshorts, nor too short. Perfect length in my opinion.