1. The hollow breast option is only available for C cup and more. B cup breasts are all filled breasts.
2. Hollow doesn’t really work well on a smaller breast.
3. A doll with E-Cup solid fill titties do not jiggle and are not very squishy. A doll with E-Cup hallow titties jiggle and are softer to squeeze.
4. Jinsan offers Gel on B cup dolls, for the record. So if ordering WM/YL/OR, you have that option.
Learn more information about sex doll breast options from here: https://www.rosemarydoll.com/sex-doll-breast-options-solid-hollow-or-gel/