Vinyl Sleeves and Jackets

I replace plain paper inners with poly/paper, be it MoFi or something else.  I've never understood the upside of MoFi sleeves over regular, decent quality poly/paper sleeves however.
Outer sleeves I've never used.  My oldest records (35+ years) can generally still be comfortably graded NM/NM and in any case I've never sold a record in my life, only given some away.

Outer sleeves should be avoided at all costs. When I buy used albums, which almost always come with outer sleeves, I always throw them out.

They irritate me and are, well, pointless. I have about 1,000 records and have been collecting since I was a kid in the 1970s. I keep my records in good condition and have never seen wear, rings, or other damage on albums I've owned since they were new. Also LPs I've had since the early 1980s and have listened to a lot are still in nearly perfect condition.

Over the last ten years or so, I've been using Ikea shelves in a dry place, don't ram records into these shelves to trigger wear and rings, and have had no problems. I do, however, use MoFi inner sleeves. Those are worth protecting and keeping static at bay.

Japanese resealable outer Mylar sleeves. 
  Dishwasher inners rice paper style. Or the mofi ones, whichever are available when I buy. 
  All my albums are cleaned, stored, and sealed in the Japanese bags. 
   It’s a sickness.  :)  

Ya’ll need to go to the Vinyl Storage Solutions website, and check out Mike’s clever (patented, I’m sure) new double-pocket outer sleeves. He also makes regular single pocket sleeves, fabricated using the best (in terms of vinyl storage) plastic. He even makes a multi-purpose sleeve, which can be used on the middle section of tri-fold LP’s. Brilliant! He also offers various sleeves for both 7" and 10" records.

Mike has also introduced excellent inner sleeves at a great price. Offered in both 2 mil and 3 mil versions, both cheaper than those from MoFi. Lots of Vinyl Community members on YouTube have tried all the sleeves, all now enthusiastically recommending them.

Mike is a Canadian with a background in plastics, and is fantastic to deal with. Free shipping on orders over about 50 bucks. For videos on the sleeves, do a YouTube search for Vinyl Storage Solutions.

Some records come with excellent anti static sleeves and I do not replace those. Otherwise I replace the inner sleeve with the sleeve city version of the MoFi sleeve. The worst sleeves are the paper ones. Paper is at the opposite end of the triboelectric series from PVC. PVC in a paper sleeve is a static electricity generator. Next time you pull a record out of a paper sleeve, gently rub the record with the paper sleeve and watch the paper stick to the record like a magnet. The funny thing is record labels are paper. A record will self generate static electricity because of the paper label. Not real high voltages but if you totally discharge a record and go back to it a week later it will have a small measurable charge on it. If you dangle a fine cotton thread over the record the vinyl will attract it but go over the label and the thread will be repelled! 
A record should always be clean when you put it in a new sleeve or you just contaminate the sleeve.