@baylinor I think we're up to +3. Collecting since '64, my collection contains about 4K titles. Started using those plastic lined inner sleeves with a yellowish pattern in the early 70's but found they sometimes leave patterned impressions on vinyl. Then started with VPR 'rice paper' type sleeves (you can now find generic types) as well as the poly outers since the 70's. 99% of my lps have these. A little pricey, but worth it in the long run. As baylinor stated, insert lp jacket 'mouth' first into the jacket, keeps dust out and leaves the index (mostly) readable. Always use poly outer sleeves, always. Keeps the jacket/cover ring and damage free. Store the factory inner sleeve (and any other inserts/posters or whatever) inside the jacket. The vinyl is kept outside the cover (without any damage problems), either inside the poly sleeve in the back, or if particularly valuable in a plain holed generic cover, sometimes referred to as a 'disco' sleeve. At times inside the same poly sleeve or an additional one if necessary. Use the mylar type sleeve with the sealer strip on the more valuable titles along with the outer poly sleeve. Can't remember which one is polyethylene and which is polypropylene (I think this is the 'mylar' type). Dust is a constant battle living in Arizona, and these methods have served me well for decades. If the outside poly sleeve gets distorted in any way, they're replaced with a new one. Oh, never a mold problem here, always dry and air conditioned. All lp's are naturally stored vertically in 1 1/2" X 10" white pine shelving I constructed myself. Many different ways of preserving your valuable collection with proponents of each. These just work best for me, trial and error being my teacher. Regards, Arizona Bob