A CPAP Hero chin strap is an adjustable, soft fabric device that holds your mouth closed during sleep to prevent air leaks from nasal CPAP masks, improving therapy effectiveness, reducing snoring, and minimizing dry mouth by promoting nasal breathing, often featuring a “halo” design for secure, comfortable, pressure-distributing fit. They’re typically latex-free, universal-sized with Velcro, and designed for ease of use, helping users stay compliant and get better rest.