The cases use TPU (thermoplastic polyurethane) and hard PC components—typically a shock-absorbent TPU shell combined with a crystal-clear PC window.
Most listings include heavy-duty carabiners and keyrings (noted as anti-rust/heavy-duty) so you can clip cases to belt loops, backpacks, or keychains for hands-free carrying.
Yes — listings note precise cutouts that provide easy access to charging ports, indicator lights, and buttons so you can charge and check status without removing the case.
Common extras include a carabiner and a keyring. At least one listing also includes a retractable cleaning tool with dual nylon brushes and a soft flocking sponge stick.
Listings describe retention methods such as premium adhesive strips that hold top and bottom covers together and sturdy locking latches to help keep the earbuds secure inside the case.