In recent years, there has been a surge in research dedicated to understanding the mechanisms of and determining the optimal treatment strategies for skeletal Class II malocclusion. Simultaneously, the implementation of invisible functional appliances in clinical settings has gained popularity, largely due to the comfort and aesthetic benefits they offer. These therapeutic appliances employ either occlusal splints or precision locks or wings that create inclined planes to advance and stabilise the mandible into a predetermined position, which further promotes neuromuscular adaptation and, consequently, modifications to the maxillomandibular positional relationship. This study describes the treatment regimen and outcomes for two skeletal Class II malocclusion cases that utilised the Herbst-derived invisible S8-SGHB device implemented by Smartee Denti-Technology (Shanghai, China).