These inner sleeves are designed to give another layer of protection to your cards. They fit perfectly around the card so that the card can be sleeved
My Sleeving Journey (A Hopefully Helpful Guide to Sleeving Options) : r/marvelchampionslcg
KMC 100 Pochettes Card Barrier Perfect Size Soft Sleeves 2 Pack Value Set ! : Toys & Games
KMC Perfect Hard Inner Sleeves
KMC CARD BARRIER PERFECT SIZE 64 x 89 mm / 100
KMC Sleeve Type Comparision – KMC Sleeves
KMC Perfect Size Inner Sleeves Review
Thin, Clear sleeve that fits inside all KMC Standard sleeves. Top loading. 89mm x 64mm in size. Thickness .05mm. Pack contains 100 sleeves.
KMC Perfect Fit Sleeves
KMC Sleeves USA Statement Regarding Quality Issues : r/magicTCG
KMC Perfect Size Card Sleeves Mini [10 Packs] : Toys & Games
KMC TopLoad Perfect 64mm x 89mm Size Sleeves USA Version 2 Packs of 100 Clear