This is a "replacement cover" for those who want a spare cover when washing. - Material: Organic cover - Function: Washable core material (sold separately) - Uses: Baby's safe space, baby carrier cushion Size: W 63.0 × H 8.0 × D 40.0 By combining it with the Trip (bag) from the same series, it becomes a C-curve mobile bed, but the mat alone can also be used in a wide range of ways.