The WoodyKnows SideSleeping Backpack Sleep Position Trainer is designed to help you develop a side-sleeping habit quickly, preventing the tongue, soft palate, and loose throat tissues from blocking the airway and alleviating snoring caused by throat issues. Its large size keeps you off your back at night, avoiding discomfort and potential spine injury associated with smaller or harder supports. The airbag's capacity can be adjusted for optimal comfort, and the backpack features a three-point fixation system on the shoulders and waist to prevent shifting during sleep. Available in two sizes, the large size is suitable for individuals with a back width larger than 16 inches (40 cm).