ProSomnus SPAC Presentation Deck

Low Adherence Limits Effectiveness of CPAP Therapy CPAP is the current leading therapy for OSA, but inherent design flaws and patient-experience drawbacks mean adherence (hours worn) has barely changed in 20 years CPAP MANUFACTURERS X X X REASONS FOR CPAP NON-ADHERENCE X X ResMed X PHILIPS RESPIRONICS Fisher&Paykel HEALTHCARE Mask discomfort Mask leakage Claustrophobia Pressure intolerance Skin irritation Noise from bedside pump X Nasal congestion X X X X Nosebleeds Nasal drying Inconvenience of device / consumables maintenance Lack of intimacy, partner disturbance, social issues X Limited portability CPAP ADHERENCE - HOURS WORN¹,2,3 3.9 Hours Despite significant investment and innovation, CPAP adherence has barely changed in 20 years ProSomnus devices demonstrated 60.7%ª better mean nightly use in clinical studies CPAP: 1999 1. Rotenberg BW, Murariu D, Pang KP. Trends in CPAP adherence over twenty years of data collection: a flattened curve. J Otolaryngol Head Neck Surg. 2016 Aug 19 2. Dieltjens M, Vanderveken O. Oral Appliances in Obstructive Sleep Apnea. Healthcare (Basel). 2019 Nov 8 3. Stern, J. Efficacy and Effectiveness. Annual Meeting of the AADSM, 2018 Jun 4. Calculated as % increase from 4.5 hours to 7.2 hours 60.7% O 4.5 Hours PROSOMNUS SLEEP TECHNOLOGIES CPAP: 2019 7.2 Hours ProSomnus 29 STRICTLY CONFIDENTIAL

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