This Chicco Next2Me Mattress Cover features a safe hooking system with four elastic bands in order to safely attach it to the mattress. Dimensions have been studied in order to match perfectly with the two side-sleeping cribs Chicco Next2me and Chicco Next2Me Dream and with the travel crib Zip & Go. Super breathable, It allows air circulation within the surface in contact with the baby and the crib’s mattress, helping baby staying cool at night. The Night Breeze Mattress cover is compact and machine washable.