Pack of 100 standard (65x90mm) clear card sleeves which fit Cosmos: Infinity cards and most other standard size card games such as MTG and Pokémon.
These are precise-fit clear protectors with a tight fit and can be used for double-sleeving when paired with larger sleeves.
Never play with your cards without some sleeves! They get damaged much faster than you expect while sleeves protect them almost completely (Obviously a sleeve can't stop you from bending them ;P ).