So I thought I was getting the hang of this and i was thinking of starting with a stash of fitteds with covers and some BG 4.0s. However, then i saw the Monkey Snuggles fitteds and it didn't look like they need covers. Is there a difference between kissaluvs fitteds and the monkey snuggles fitteds? Do some need covers while others don't? Maybe I'm just confusing myself? Help please!