I also got the slip cover for it as well (same reason). I just purchased a Dansco album for some of my lower grade Two Cents varieties collection, I have not loaded it up yet, but will pretty soon. I do love my black cats - but the hair can be a pain as it staic properties of the holders attracts the hair like nothing else! I store my 2x2 mylars in carboard 2x2 boxes or in archival pages, in a 3 ring binder, inside a slip cover (mainly to keep all the dust and cat hair off them). The cost of the staples is minimal for 5000 count boxes. I recently purchased the flat cinch stapler off eBay from one of the big coin supply dealers, after not being able to find one locally at office supply stores, the stapler works great, the staples are flat after stapling, no need to use pliers anymore. I think it was due to more air getting into and around the coins in the flips - the cardboard mylar ones sealed better with 3 staples pressed firmly with the pliers. Coins stored in 2x2 mylar flips still seemed to tone darker more quickly even well stored in dry, dark areas, than the coins I had in the cardboard mylar 2x2s. Then I moved to San Diego, the toning didn't happen as fast, but now I had salt water in the air to deal with. The higher heat and humidity began turning many of my silver coins dark brown. I lost a bit of money on a bunch of nice Indian Head cents I had in those. I've found living in Colorado at altitude where it is dry and cool, I never had much issue, as soon as I moved to Houston, the soft flips became a nightmare with coins literaly swimming in green PVC hydrochloric acid gunk. I used all types of flips from the PVC days on, as soon as we found out how bad PVC damages coins I dumped all of those except for short term storage, (I have crown sized flips for submitting to TPGs) otherwise I never use the soft flips - EVER for storage. I like to have the written stuff on the coin holder around the coin, with the clear safe-flips the coin covers up the notes until you flip the holder open, hard to do so going through boxes of coins. When I have most of my coins in 2x2 cardboard mylar holders held with flat cinch staples, and before I got a flat cinch stapler, I always used needle nose pliers to flatten all staples.

Mylar coin flip