I had recently started Vinyl collection and as any newbie in this hobby ended up with quite a few pre-owned LPs to start with.
The covers and inner sleeves of them were in tatters, due to which the Vinyl would gather lot of dust as well as minor scratches.
When I came across this thread, I immediately ordered the outer and inner sleeves.
Then I washed the LPs and put them into these new inner sleeves.
Now I can directly open the LPs and play it without much hassles.
The outer sleeves helps prevent the dust from accumulating inside.
Also the inner sleeves are a perfect fit due to which it further reduces the dust accumulation and also the soft inner lining of these sleeves prevents the LP from getting hair line scratches which generally happen when you use the regular covers.