I was looking for safe plastic sleeves some time ago, but couldn't find anything for medals with a guarantee from the seller. So I used the idea from our fellow forum member Pobeda. You can see it in the link below.
Thanks for the nice shoutout. I am constantly perfecting my over-engineered (but archivally safe) storage method.
Here's my latest method: it requires Saflips 2x2 coin flips and the soft tall baseball card sleeves, but also a pair of little scissors.
First, I cut a little "T-shape" on top, this really varies on suspension type. This medal has a newer aluminum suspension so I cut the T-shape deeper than on older suspensions.
Second, I insert the medal into the flip while letting the original pin rest on the T-section.
top view--as you see the ribbon is on the outside of the sturdy Saflip while the medal is inside the sleeve; I then insert it into the baseball tall sleeve and seal with a little label. I have an acid-free pen I can subsequently use if I choose to research the medal.
Pardon the cat hair, it's everywhere in my apartment!
I use a similar method with Veteran Znachki--but if the reverse is blank I'll usually just use acid-free black cardstock, let the badge hang down from its original pin attachment, and insert into the PVC-free baseball sleeve before putting them all into a 3x2 archivally safe album pages.