i used them up until about 2 monthes ago when val tried to jump out of her crib by bunching it up and standing on it lol...if she hadnt done that i would still be using them
i dont know, a lot of people would say im in the wrong because i have val sleep on a boppy (its for her reflux, so she stays elevated, i had a pillow under her matress until recently when she climbed up on the "hill" and almost jumped out AGAIN!)
i think its supose to have some POSSIBLE connection with sids (but what doesnt these days, its almost as bad as cancer EVERYTHING causes it) i think its something like the air doesnt circulate (which i dont understand, they have all the room above them to circulate air