Using Best Day Ever"s Serendipity Crib Mattress Covers is one of the most important things you can do to ensure your little one"s safety. * Serendipity Mattress Covers are the best toxic gas barrier available in America. Our cover"s universal design will fit any standard crib mattress as well as most co-sleepers, pack-n-plays, and play yards. * Whether a mattress is brand new or a well-worn hand-me-down, Serendipity provides a clean toxin-and-allergen free sleeping environment. * One of the most serious hidden threats to your child is toxic off-gassing from crib mattresses. In fact, a New Zealand study has linked this off-gassing to SIDS/SUID deaths. In response to this study, New Zealand began a mattress wrapping campaign in 1995. Over the next 15 years, some 210,000 mattresses were wrapped with a toxic gas barrier and not one single baby using those mattresses died of SIDS. As a result, the overall SIDS death rate in New Zealand dropped by 70% in that period. * For more information visit ilovebestdayever.com