The inner storage thickness of the C90 is 25mm. But the upper and lower panels have built-in fiberglass reinforced elastic plastic sheets, so the maximum storage thickness can expand up to 27mm.
The C90 uses the same black Nappa leather with lychee pattern as the HS270 black limited edition headphone stand which is very smooth and delicate.
As with the previous C80 cases, the cover is designed with a left-right symmetrical
magnetism structure which automatically closes after releasing your fingers.
A 90mm square, the C90 is slightly larger than it's smaller sibling the C80 for which it's replacing.
This case is the perfect size for in ear headphones and is very easy to open and close. It uses magnetic flaps for closure.