there is a whole thread or two or three on this, explaining it. put it in the search box and they should come up.
i can never remember the difference, but i did buy the pillowcases on curlmart and it seems they were the right choice.
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3a, some 2c & 3b, medium texture, porosity normal, low elasticity
washing/cowashing, conditioning, protein tx: [I] curl junkie products
leave in:cj conditioners and treatments as leave in
styling: cj aloe fix gel, cj pattern pusha, cj honey butta leave in, cj cccc, cj ciab.
sealants - jane carter nourish & shine