Thanks i found some actually in the store guess it's better to go inside the store vs looking online......So I'm lining the top & back of the box only ???? No sides walls ?You can use the regular pink fluffy fiberglass which works about the same it's just more itchy. You can also use polyfill if you can find a way to line the walls with it.
Wish i knew this hour ago i found some R13....ThanksYou can use 1.5" foam mattress topper from Wal-Mart as well.
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