The Best Bottom diaper system is designed to use snap-in inserts but regular prefolds work fine, too.
I love that these are smooth inside (no extra flap of fabric) so they're easy to wipe and don't hold odor. They have leg gussets and have never leaked for us. I switched to using this brand all the time during the day because they fit my narrow-waisted baby.
I also hope to use the snap-in inserts more as my baby becomes more independent with the elimination communication because they're easy to get on and off without the insert falling out. The snap-in inserts can also be used later in the Best Bottom Training Pants.