Compatible Models The safety lock case is designed specifically for the new for Bose QuietComfort earplugs II 2022 and is not compatible with for Bose QuietComfort earplugs (2020) and for Bose sports earplugs. Safety lock design The for Bose QuietComfort earplug II protective sleeve adopts a unique safety lock design to ensure a secure connection between the earplugs and the phone case, avoiding accidental separation and loss. Durable Protection: A sturdy shell made of thermoplastic polyurethane (TPU) material provides reliable protection and effectively prevents damage to the earplugs from dust, collisions, drops, and scratches. Convenient charging The design of the safety lock cover takes into account the charging needs of the earplugs, allowing for easy charging without the need to remove the protective cover. Fashion Appearance In addition to providing reliable protection functions, the safety lock sleeve also has a fashionable appearance, making your for Bose QuietComfort earplugs II 2022 even more outstanding. Material: tpu Color: black, gray, blue Applicable model: for Bose QuietComfort earplugs II Packaging includes 1 * Earphone protective coverfor