Kiddie Kot Standard Stacking Cots — Set of 5 by Early Learning Resources .Fabric cover has an adjustable “loop-lock” closure that allows you to adjust the tautness or easily remove for washing. Fabric fits tight to the sturdy copolymer corners with no gaps. Features sturdy corners that are a full 6” off the ground to allow proper air circulation. Stacking, storing and moving is a breeze when you add a caster set to the bottom cot (sold separately). Caster set has 2 locking and 2 non-locking wheels. Fire retardant and conforms to CRF-117. Standard Size (52″L x 23″W x 6″H).