Interior covers, which wrap a leather-like soft material over the hard case to protect it when using a NAHOK briefcase or rucksack,when the hard case is too bulky or does not fit inside the NAHOK single case.

In addition, we have made a simple case made of the same material for flutes that can be easily inserted into a hard case.
This can be used as a music stand case as well as a hard case.
This is made of a soft leather-like material with a brushed inner surface.