We do not recommend storing Weeks in a zipper-type notebook covers for the Original or Cousin. 

There are dedicated Zipper type covers for the Weeks so please consider using one of those. 

If you do choose to store the Weeks in a zipper-type techo cover, please note the following: 

・With the Zipper-type covers made for the Original (A6), the cover insert is not the correct size, so you cannot use it with the Weeks. This means there is nothing to prevent the Weeks book rubbing against the zipper, causing deterioration.  

・With the Zipper-type covers made for the Cousin (A5), you can store Weeks in the outer pocket or large inner pocket. However, there is a risk that the Weeks may move around inside, causing the corners to bend, or the zipper may become stuck.