Complex sentence: The SMAS (Superficial Musculo Aponeurotic System) layer consists of suspensory ligaments that encase the cheek fat, thereby causing them to remain in their normal position.
Split into simpler sentences: The SMAS (Superficial Musculo Aponeurotic System) layer consist of suspensory ligaments that encase the cheek fat. Thereby causing them to remain in their normal position.