I've been buying from Sleeve City for over ten years.
Inner
Outer
Here's what I do:
- Put the original inner sleeve back in the record cover with the sleeve's opening facing up.
- Put the record in an inner sleeve (above.)
- Put the cover in an outer sleeve (above) with the cover's opening pointed to the right and the outer sleeve's opening facing up.
- Slide the record in its inner sleeve between the back cover and the outer sleeve, with the inner sleeve opening pointing to the left - opposite the opening of the cover.
Saves wear and tear on the cover, easy retrieval and return of the record.