I use the dual pocket sleeves from Vinyl Storage Solution. The outer sleeve is in one pocket on itself, never gets touched. The record and anything else (lyrics sheet, hype sticker, photos, posters, note cards) are in the second pocket. Same also for (double) albums. VSS also has oversized sleeves for those thick records, or those that were made a bit larger.
VSS inner sleeves have no print on it, unlike the annoying mofi branding. This is a big selling point in favor of VSS, which also has two different thicknesses.

